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CIHM/ICMH 

Microfiche 

Series. 


CIHM/ICMH 
Collection  de 
microfiches. 


Canadian  Institute  for  Historical  Microreproductions 


institut  Canadian  de  microreproductions  historiques 


1980 


Technical  Notes  /  Notes  techniques 


The  Institute  has  attempted  to  obtain  the  best 
original  copy  available  for  filming.  Physical 
features  of  this  copy  which  may  alter  any  of  the 
images  in  the  reproduction  are  checked  below. 


D 
D 

D 


Coloured  covers/ 
Couvertures  de  couleur 


Coloured  maps/ 

Cartes  g6ographiques  erv  couleur 


Pages  discoloured,  stained  or  foxed/ 
Pages  d^coior^es,  tachet^es  ou  piquies 

Tight  binding  (may  cause  shadows  cr 
distortion  along  interior  margin)/ 
Reliure  serrd  (peut  causer  de  I'ombre  ou 
de  la  distortion  le  long  de  la  marge 
intdrieure) 


L'Institut  a  microfilm^  le  meilleur  exemplaire 
qu'il  lui  a  6t6  possible  de  se  procurer.  Certains 
d6fauts  susceptibles  de  nuire  A  la  quality  de  la 
reproduction  sent  notte  ci-dessous. 


D 
D 
D 


D 


Coloured  pages/ 
Pages  de  couleur 


Coloured  plates/ 
Planches  en  couleur 


Show  through/ 
Transparence 


Pages  damaged/ 
Pages  endommag6es 


Th( 
po) 
of 
filr 


Th( 
coi 
or 

api 

Thi 
filr 
ins 


Mi 

in 

up 

bo 

fol 


D 


Additional  comments/ 
Commentaires  suppl6mentaires 


Bibliographic  Notes  /  Jotes  bibliographiques 


Only  edition  available/ 
Seule  Edition  disponible 


Bound  with  other  material/ 
Reli6  avec  d'autres  documents 


Cover  title  missing/ 

Le  titre  de  couverture  manque 


D 

n 


Pagination  incorrect/ 
Erreurs  de  pagination 


Pages  missing/ 
Des  pages  manquent 


Maps  missing/ 

Des  cartes  g6ographiques  manquent 


D 

0 


Plates  missing/ 

Des  planches  manquent 


Additional  comments/ 
Commentaires  suppiimentaires 


Title  page  missing. 


The  [mages  appearing  here  are  the  best  quality 
possible  considering  the  condition  and  legibility 
of  the  original  copy  and  in  keeping  with  the 
filming  contract  specifications. 


Lbs  images  suivantes  ont  6t6  reproduites  avec  le 
plus  grand  soin,  compte  tenu  de  la  condition  et 
de  la  nett«n6  de  Texempiaire  film6,  et  en 
conformity  avec  les  conditions  du  contrat  de 
filmage. 


The  last  recorded  frame  on  each  microfiche  shall 
contain  the  symbol  —►(meaning  CONTINUED"), 
or  the  symbol  V  (meaning  "END"),  whichever 
applies. 


Un  des  symboles  suivants  apparattra  sur  la  der- 
niire  image  de  cheque  microfiche,  selon  le  cas: 
le  symbols  — ►  signifie  "A  SUIVRE",  le  symbols 
V  signifie  "FIN". 


The  original  copy  was  borrowed  from,  and 
filmed  with,  the  Itind  consent  of  the  following 
institution: 

Entomology  Research  Library, 
Agriculture  Canada 

Maps  or  plates  too  large  to  be  entirely  included 
in  one  exposure  are  filmed  beginning  in  the 
upper  left  hand  corner,  left  to  right  and  top  to 
bottom,  as  many  frames  as  required.  The 
following  diagrams  illustrate  the  method: 


L'exemplaire  i\\m6  fut  reproduit  grAce  d  la 
g6n6rosi^6  de  i'dtablissement  prAteur 
suivant  :  Bibliotheque  de  Recherche 

Entomologique , 

Agriculture  Canada 

Les  cartes  ou  les  planches  trop  grandes  pour  dtre 
reproduites  en  un  seul  clichA  sont  filmAes  d 
partir  de  Tangle  supdrieure  gauche,  de  gaurSis  d 
droite  et  de  haut  en  bas,  en  prenant  le  nombre 
d'images  nAcessaire.  Le  diagramme  suivant 
illustre  la  mdthode  : 


1 

2 

3 

1 

2 

3 

4 

5 

6 

St 

VI 

ni 
t\ 
tr 
tc 
\v 

Pi 
ei 

Pi 
\\ 

i" 
pi 

eci 
m 


lU 

ar 
til 
an 


;  / 


Revision  of  the  !!iT£.\I\I  of  Ameiica  ^oitii  of  Mexico. 

Insects  of  the 
Family  SlaphyUnidae,  order  Cohoptera. 

Bv  Tiios.  L.  Casey,  Lieut,  of  Eiig'rs. 

MEMBHll    OF    THE    ENTOMOLOOICAL    SOCIETY    OE    FUANCE, 


TitK  present  revision  liiis  been  written  in  order  to  carry  our  knowl- 
edge of  the  immense  family  Stapliylinidae  one  step  further  toward  a 
state  of  approximate  completeness,  and  to  close  a  gap  which  has  loiij 
been  left  untouched,  on  account  of  the  great  number  of  species  in- 
volved, and  because  of  tlieir  uniformity,  small  size,  and  apparent 
monotony.  Large  collections  of  material  have  been  accumulating  for 
the  last  fifty  years,  until  the  number  of  species  represented  has  b(;come 
truly  immense,  and  is  yearly  increasing;  it  is,  therefore,  in  addition, 
to  make  at  least  an  attempt  to  classify  and  describe  such  species  as 
we  now  have  rejiresented  in  our  cabinets,  not  only  to  save  them  from 
piolonged  oblivion  by  reason  of  possible  destruction,  but  to  render 
easier  the  task  of  keeping  up  in  future  with  the  collectors,  that  the 
present  work  is  presented  to  the  entomological  world ;  not,  however, 
without  many  misgivings  on  the  part  of  the  author. 

The  filling  of  the  above-mentioned  gap  in  the  series  will,  in  con- 
junction with  a  work  of  similar  scope  upon  tiie  Philonthi,  already 
published  by  Dr.  Geo.  IL  Horn,  of  Philadel[ihia,  render  our  knowU  m^00' 
edge  of  the  North  American  Stapliylinidae  outside  of  the  Aleocharini, 
much  more  satisfactory.  It  is  true  there  are  in  such  genera  as  Tro- 
gophlrtius,  Bledius,  and  many  others,  a  large  number  of  species  still 
undescribed,  but  the  genera  have  for  the  most  part  been  investigated, 
and  proper  methods  of  classification  generally  indicated,  so  that  the 
task  will  in  these  cases  consist  of  the  mere  description  of  new  specii... 
and  their  interpolation  in  the  tables.  ^ 

Stenini.  1 


2 


NORTH    AMKRICAN 


For  tlie  great  mass  of  material  which  lias  been  under  esaminatioii, 
aniountiiig  in  all  to  nearly  two  thousand  s[ieeiniens,  I  am  indebted 
first  to  3Iessrs.  E.  A.  Schwarz  and  11.  G.  IFubhard,  wlio  kindly  placed 
their  entire  collection  at  my  disposal.  Tiiis  is  a  most  snrprisiiiff  ag- 
gregate of  these  small  insects,  collected  maiidy  in  the  Lake  Sn|)erior 
Kegion  ;  also  at  Detroit,  ]Mich.,  Cand)ridge,  3Iass.,  at  various  points 
in  the  Veninsula  of  Florida,  at  Columbus,  Texas,  and  in  Colora<lo ; 
besides  others  in  the  same  cabinet  collected  by  Mr.  Morrison  in  the 
Lake  Talioe  Region  of  Nevada,  and  in  'Washington  Territory.  Pro- 
bably four-Hfths  of  tlie  entire  number  of  species  here  described  are 
due  to  the  scientilic  collecting  of  these  Coleopterists.  I  am  also  greatly 
indebted  to  the  late  Dr.  J.  L.  LeConte,  who,  a  siiort  time  before  his 
death,  placed  his  entire  set  of  this  tribe  in  my  hands.  This  collection 
is  made  up  principally  of  a  considerable  series  of  specimens,  collected 
by  the  late  Mr.  G.  11.  Crotch  in  widely  separated  points  of  California, 
in  Britisli  Columbia,  and  in  Vancouver  Island,  and  also  contains 
large  donations  from  the  cabinet  of  Messrs.  Hubbard  and  Schwarz, 
as  well  as  a  smaller  number  gathered  together  from  other  sources. 

To  Mr.  J.  Pettit,  of  Grimsby,  Ontario,  I  owe  my  best  thanks  for  a 
large  collection  in  alcohol,  made  by  himself  in  that  part  of  Canada 
immediately  about  his  home  ;  and  I  am  also  under  obligations  to  Dr. 
G.  II.  Horn,  of  Philadelphia,  and  INIr.  C.  "V.  IMey,  of  Washington, 
for  small  sets  of  specimens,  being  all  that  their  cabinets  chanced  to 
contain  at  the  time. 

In  conclusion,  I  cannot  fail  to  express  my  thanks  to  M.  Aug.  Salle, 
of  Paris,  for  a  type  collection  of  the  more  common  European  species 
witli  which  that  distinguished  entomologist  most  kindly  answered  my 
request ;  they  have  been  of  great  use  in  determining  the  identity  of 
teveral  species. 

It  will  be  seen,  upon  consulting  the  map  of  North  America,  and 
noting  the  several  localities  given  above,  that  the  extensive  region 
abo'it  the  Great  Salt  Lake,  and  thence  stretching  in  a  broad  belt,  em- 
bracing Lakes  Winnipeg,  Athabaska,  and  Great  Slave,  as  well  as 
the  entire  region  of  ^abrador  about  Hudson's  Bay,  and  the  Missis- 
sippi Valley  from  the  source  of  the  river  to  its  mouth  in  Louisiana, 
are  almost  wholly  unrepresented  in  the  collections  which  are  before 
me.  Afi  it  is  apparent  that  a  large  number  of  species  are  quite  local 
in  habitat,  many  new  ones  will  undoubtedly  be  brought  to  light  when 
these  vast  regions  are  sufficiently  explored.  Until  they  shall  have 
been  collected  over,  it  must  be  quite  useless  to  treat  exhaustively  of 
geographical  distribution.     It  may  be  stated,  however,  that,  as  a  rule, 


COLEOPTEUA. 


8 


tlie  northern  rejiioiis  are  tlie  true  home  of  the  Stenini,  and  liere 
they  exist  in  iir()(li;j;ioiis  variety  and  number?.  As  we  go  soutli  the 
species  and  individuals  become  much  less  numerous,  until  tinally,  in 
the  West  India  Islands,  there  is,  according  to  Mr.  Schwarz,  but  one 
species  at  present  known.  This  rule  does  not,  however,  apply  strictly 
throughout,  and  there  are  many  species  described  from  Mexico  and 
tropical  South  America,  but  in  these  cases,  if  I  am  correctly  informed, 
they  are  generally  found  in  the  mountainous  districts,  and  consequently 
in  a  climate  more  temperate  in  its  nature  tlian  that  of  the  surround- 
ing regions. 

The  species  of  the  Atlantic  seaboard  are  generally  distinct  from 
those  inhabiting  the  great  internal  lake  region,  and  both  these  in  turn 
differ,  in  general,  from  those  of  the  Pacific  coast  and  Alaska.  The 
speci<,'s  from  California  and  N(;vada  have,  as  a  group,  a  somewhat 
difl'erent  appearance  from  the  Eastern  species,  being  generally  robust 
and  more  depressed,  with  smaller  heads  and  longer  elytra.  On  the 
other  hand,  a  few  forms,  as  Juno  (Fab.),  semicolon  Lee,  and  styyicns 
Say,  have  a  very  wide  range  of  distribution,  and  several  are  known 
to  be  quite  cosmopolitan. 

It  will  be  seen,  on  comparing  our  fauna  in  this  group  with  that  of 
Europe,  that  they  differ  decidedly  in  the  relative  proportions  of  si)ccies 
with  simple  tarsi  and  those  in  which  the  fourth  joint  is  bilobed,  or, 
according  to  the  divisions  here  adopted,  in  the  genera  Stenus  and 
Areus  respectively. 

Philadelphia,  Aug.  10,  1884. 


STENINI. 


General  Ciiahacters. 

Head  variable  in  size,  usually  large  and  relatively  much  wider 
than  long.  Eyes  large,  strongly  convex,  occupying  nearly  the  entire 
side  of  the  head,  sometimes  sparsely  and  minutely  setose,  always 
finely  reticulated ;  lenses  not  percejitibly  convex.  Labruni  large, 
corneous,  strongly,  evenly  and  broadly  arcuate  anteriorly ;  entire 
surface  rapidly  declivous,  conical.  Interocular  surface  variable  in 
form,  generally  more  or  less  depressed,  sometimes,  however,  feebly 
convex ;  generally  having  two  longitudinal  sulcations,  which  are 
slightly  convergent  anteriorly,  the  intermediate  surface  being  more 
or  less  convex  and  prominent ;  rarely  the  sulcations  and  longitudinal 


4 


NOHTII    AMEUICAN 


elevation  are  entirely  absent,  and  the  surface  between  the  eyes  evenly 
tlut  or  curved  tliroiigliout.  Antennae  varying  but  sligiitly,  11 -jointed, 
sunu'tinies  rather  long  and  strongly  clubbed  (Dianous),  in  two  species 
(sub-gen.  IMutinus)  long  and  very  feebly  enlarged  toward  the  tip, 
generally  distinctly  clubbed  and  slightly  longer  than  the  width  of 
head;  first  two  joints  always  more  robust  than  the  funicle,  inserted 
upon  the  frcuit  under  slight  tubcrculations  of  the  up|)er  surface, 
^[axillary  palpi  generally  very  well  devi'lo|)e(l,  first  joint  shortest  and 
almost  invariably  palest  in  color,  third  joint  longest,  more  or  less 
strongly  and  gradually  enlarged  toward  the  tip,  fourth  extremely 
minute,  generally  spinous,  acute,  and  seldom  visible,  exce|)t  under 
favoi'able  conditions  anil  under  the  high  powers  ol'  the  microscope. 
Labial  palpi  very  small,  second  joint  very  robust,  third  spiniform  and 
minute.  Maxillae  short,  lobes  membranous  toward  tip,  where  they 
are  densely  and  coarsely  ciliate.  Mentum  trai)ezoidal,  nearly  trans- 
versely truncate  anteriorly,  having  upon  its  exposed  surface  a  strongly 
elevated,  triangular  process,  separated  from  the  base  of  the  mentum 
by  a  transverse,  curved  canaliculation  ;  apex  of  the  triangle  acute 
and  generally  projecting  slightly  beyond  the  anterior  margin  of  the 
mentum;  sides  of  triangle  generally  incurvate  ;  the  mentum  usually 
bears  s<n-eral  setae  ii-regularly  disj)Osed.  Ligula  membranous.  ^lan- 
dibles  long,  arcuate,  acicular  toward  the  tip,  which  is  very  acute; 
having  internally  near  the  apex,  a  long,  very  acute,  recumbent  tooth, 
which,  however,  is  sometimes  shorter  and  robust. 

I'rothorax  usually  more  or  less  elongated,  always  strongly  convex, 
and  sometimes  sub-cylindrical,  often  longitudinally  canaliculated,  and 
more  or  less  tuberculate  at  the  base. 

Elytra  wider  than  the  i)rothorax,  generally  longer  than  wide, 
moderately  convex,  usually  more  or  less  impressed  along  the  suture, 
more  particularly  toward  the  base,  also  often  imi)ressed  near  the 
humeri,  thus  giving  the  appearance  of  a  slight  longitudinal  tubercula- 
tion  near  the  middle  of  the  base  ot  each  elytron  ;  together  broadly 
and  more  or  less  feebly  emargiiuite  behind  ;  sides  more  or  less  diver- 
gent posteriorly,  generally  slightly  arcuate. 

Abdominal  segments  seven  in  number,  usually  decreasing  in  width 
posteriorly,  sometimes  (^Areus  advena),  with  the  fourth  and  fifth  seg- 
ments wider  than  the  first  and  second.  P^ach  dorsal  segment  has  at 
the  base,  a  transverse  elevated  ridge,  which  generally  has  several 
cusped  prolongations  posteriorly. 

Legs  variable  in  length,  generally  rather  long  and  somewhat  slender, 
always  pubescent.     Tibiae  usually  nearly  equal  in  thickness  through- 


COLEOI'TEKA.  0 

out,  and  feebly  sigmoid,  unarmed,  liiiving  nt  the  tip  a  dense  fringe  of 
very  short  cinereous  setae.  Tarsi  varying  greatly  in  length,  as  is  also 
the  case  witli  the  relative  lengtlis  of  tiie  joints,  .O-jointed,  having  all 
the  joints  normally  cylindrical,  or  having  one,  sometimes  two  or  three 
joints  sliglitly  enlarged  or  bilobed ;  strongly  pubescent  beneath ; 
claws  appendiculate,  rather  small,  simple  or  nearly  so. 

Anterior  coxae  small,  siib-conical,  sliglitly  prominent ;  intermediate 
slightly  separat(;d,  posterior  conical. 

Prosternuin  always  punctate,  generally  having  longer  pubescence 
than  any  other  portion  of  the  body. 

Entire  body  |)unctate,  punctures  never  absent,  ahvays  very  distinct, 
generally  more  or  less  ct)alescent,  giving  a  very  diversilied  character 
to  the  sculptiu'c. 

Body  generally  winged,  sometimes  apterous,  generally  of  a  deep 
black,  sometimes  having  a  sliglit  metallic  lustre.  Legs  sometimes 
puler.     P^Iytra  rarely  ornamented  with  two  orange-colored  spots. 

Pubescence  always  present,  sometimes  very  prominent  and  long,  in 
other  cases  extremely  sparse  and  short,  generally  cinereous,  fulvo-  or 
flavo-cinereous,  or  flavate,  sometimes  pale  piceous,  always  setiform 
and  more  or  less  erect. 


The  insects  composing  this  group  are  all  small,  generally  minute  ; 
their  appearance  is  very  distinct,  and  there  is  no  possibility  of  mis- 
taking them,  tlie  very  hirge  eyes  reminding  ns  in  some  cases  of  Cicin- 
dela  in  miniature.  Tlieir  uniformly  black  color  and  deeply  sculptured 
integuments  isolate  them  completely  from  any  other  of  the  family 
groups. 

Their  habits  are  very  variable ;  the  movements  of  some  are  rapid, 
of  others  rather  sluggish,  some  running  continuously  for  long  dis- 
tances, others  halting  every  few  paces  like  the  common  house-fly  ; 
some  are  found  on  the  muddy  or  sandy  banks  of  ponds  or  streams, 
running  swiftly  in  the  hot  sunsliine  ;  others  are  to  be  met  with  only 
in  the  cool  recesses  of  moss  or  debris  cast  up  by  the  waves  ;  otliers 
again  occur  only  under  the  bark  of  old  logs.  All  are  probably  car- 
nivorous, capturing  their  prey  alive  like  most  of  the  Carabidae,  and 
are  not  to  be  met  with  near  carrion  or  excrements,  except,  perhaps, 
in  order  to  devour  some  of  the  numerous  minute  insects  always 
swarming  about  such  pabulum. 

Regarding  the  protrusion  of  the  ligula  with  its  attendant  para- 
glossae,  it  can  only  be  said  that  in  our  species  it  is  a  very  rare  con- 


6  NOUTII    AMKKICAN 

ditioii  ;  iimong  tlie  multitii<U!  cxaniincd  I  liiiv(!  only  rioted  it  in  three 
Bpecies,  Ausfini,  niillvpunis,  and  ninbratiUs,  nnd  then  in  but  one 
8|)(!cim('n  of  f'iicli.  It  is  cciiainly  a  very  siM-|)rising  pliciiDmcnon,  and 
everytliinj^  said  coitecrning  it  must  he  more  or  less  opinionalive  ;  as 
fur  as  I  iiave  hecn  abh-  to  perceive,  it  is  purely  aecidentul. 

The  structure  of  the  meiitum  has  been  very  singularly  mistaken  by 
Ericlison,  that  author,  usually  so  accurate,  stating  that  the  part  is 
triangular  in  outline  ;  this  is  to  be  accounted  for,  from  the  fact  that 
the  mentum  is  generally  deeply  seated  among  the  oral  organs,  only 
the  triarigular  carination  of  its  exposed  surface  being  clearly  visible; 
this  was  undoubtedly  mistaken  for  the  entire  mentum,  althougli  it  is 
difficult  to  understand  how  its  form  could  have  been  overlooked  during 
the  i)rocess  of  dissection. 

It  will  be  seen  that  I  have  departed  from  the  usual  mode  of  treat- 
ing the  genus  Stenus,  by  dividing  it  into  two  genera,  according  as  the 
tarsal  joints  are  simple  or  bilobed.  This  will  i)robably  meet  with 
opposition  and  perhaps  be  totally  discarded  ;  I  have  therefore  not 
repeated  specific  names  in  the  new  genus,  so  that  they  can  be  united 
without  causing  confusion.  Most  of  the  species  of  Areus  can  be 
recognized  at  a  glance,  without  examining  the  tarsi,  indicating  a 
more  or  less  natural  division  ;  and  for  those  species  which  may  be 
considered  connecting  links,  the  propriety  can  be  no  less  than  that 
which  warrants  the  continuance  of  many  genera  of  Carabidae,  as,  for 
instiince,  8elenophorus.  There  is  no  species  in  our  fauna  which 
cannot  be  placed  at  once  in  its  j)roper  genus,  and  the  division  is 
certainly  to  be  recommended  on  the  score  of  convenience,  having  in 
mind  the  fact  that  generic  limits  miist  always  be  more  or  less  arbi- 
trary. 

In  our  fauna  the  genus  Areus  is  much  less  homogeneous  than  Stenus, 
having  forms  such  as  advena,  megalops,  and  Sayi,  which  may  with 
further  study  be  considered  as  possessing  characters  of  generic  value. 
In  Stenus,  when  the  third  or  fourth  ventral  segment  is  modified  in 
the  male,  the  fifth  is  invariably  affected,  while  in  Areus,  the  second, 
third,  and  fourth  segments  are  often  modified,  when  the  fifth  is  per- 
fectly normal.  .,  ••  ■ 

Explanatory  Notes. 


In  a  group  in  which  the  species  are  very  closely  related,  long  and  full 
descriptions  are  a  necessity,  and  I  have  perferred  to  make  each  description 
complete  in  itself,  and  all  of  like  construction.  To  save  time  in  comparisons, 
similar  parts  are  defined  at  corresponding  places  In  each.     This  form  is  the 


COLEOl'TKnA. 


rt>siilt  of  consiili'raMp  iiiooiivt'iiii'iice,  cxjicriciiccd  in  coufiiilting  several  work^ 
where  the  descriiiti)!)  of  one  species  refers  to  that  of  anotlier,  and  this  in  turn 
often  to  a  third,  thus  neoessitatinj;  a  larjje  amount  of  readinj,'  and  referenco 
lieforn  tlie  full  description  is  readied.  Althougli,  by  tiie  nietiiod  ]iroposed, 
there  must  be  a  lar<;e  amount  of  rejK-tition,  it  is  lioped  that  tlie  convenience 
in  liavin;;  all  tin-  i)arts  of  a  des(!ripti<in  under  its  own  headiui^,  will  repay 
the  ailditional  labor.  The  descriptions  have  invariably  been  taken  from 
iiialea,  when  present,  unless  the  contrary  is  stated. 

In  dericribiii);;  the  sexual  modifications,  various  terms  are  employed,  which 
it  may  be  well  to  explain  as  follows  : — 

EimtrijiiMle., — Tliis  term  is  applied  to  an  abrupt  discontinuity  of  an  edge, 
the  line  joining;  the  two  points  of  discontinuity  being  rei-ntrant,  and  niori>  or 
less  broadly  rounded,  A  certain  latitude  is  allowed  in  the  greater  or  less 
prominenoo  of  the  exterior  angles,  they  being  in  some  cases  slightly  rounded, 
in  others  very  prominent,  acute,  and  ])rojecting,  and  also  in  the  degree  of 
curvature  of  the  line  forming  the  reentrant ;  this,  though  in  the  great 
majority  of  cases  very  broadly  rounded,  may  in  certain  instances  be  rather 
acutely  so,  which  is  particularly  the  condition,  when  the  emargination 
approaches  in  configuration  the  more  or  less  triangular  notch  known  as  an 
incisure. 

Sinuate. — AVhen  the  lino  bounding  the  vertex  of  a  segment  is  uninterrupt- 
edly curved  throughout,  but  reentrant  in  the  middle,  it  will  be  designated 
by  this  term.  In  this  ease  the  reentrant  jjortion  is  called  the  sinus,  and  tin? 
two  lat(!ral  rounded  projections  the  apices.  Comparisons  are  fre(jU(!iitly 
drawn  between  the  degrees  of  curvature  of  the  sinus  and  apices,  as  will  be 
seen  subsequently,  and  will  be  understood  to  refer  to  the  ]ioints  when*  the 
curvature  is  a  maximum,  or  at  th<!  bottom  of  the  sinus  and  tips  of  tlie  apices. 
If  a  right  line  bo  imagined  drawn  tangent  to  the  apices,  the  distance  from 
it  to  the  bottom  of  the  sinus  will  represent  the  depth  of  th<!  latter,  and  the 
distance  between  the  jKiints  of  tangency  its  width  ;  the  same  rule  is  ajipli- 
cable  to  the  measurement  of  all  notches  and  emarginations. 

ImtKrd. — When  the  emargination  takes  the  form  of  a  triangular  notch,  this 
term  will  be  applicable.  The  anterior  angle  is  called  the  angle  at  the  vertex, 
anterior  angle,  or  sinijjly  the  angle  of  the  incisure;  the  points  at  which  the 
posterior  edge  of  the  segment  becomes  interrupted  to  form  the  notch  are 
designated  the  exterior  angles.  The  sides  of  the  notch  are  generally  straight, 
and  should  always  be  so  understood,  unless  the  contrary  is  expressly  stated, 
and  a  slight  latitude  is  allowed,  in  that  all  the  angles  may  be  slightly 
rounded,  and  the  sides  sometimes  arcuate  or  sinuate  ;  the  former  is  very  rare, 
but  occurs  in  the  genus  Areus. 

Biluhed, — This  term  I  have  applied  when  the  tip  of  a  segment  is  emarginate, 
the  notch  being  a  perfect  cusp  in  outline,  and  the  sides  or  arms  being  widely 
divergent  and  evenly  curvate.  We  have  in  this  case  the  two  uninti^rrupt- 
edly  rounded  apices,  as  in  the  instances  cited  under  the  term  sinuate  ;  but 
here  the  edge  is  acutely  notched  in  the  middle.  The  only  latitude  allowed 
in  this  instance  is  that  the  cusp  inay  in  certain  forms  be  narrowly  rounded  ; 
these  cases  are  distinctly  stated,  otherwise  the  term  is  to  be  considered  as 
indicating  a  perfect  cusp  point. 


' 


8 


NOUTII    AMKIUCAN 


For  |)iir|inHi>8  of  tni-asiiroiiUMit,  the  head  is  .supposed  to  In-  limited  \ty  two  sets 
of  t!ui;,'ciit  liiii's  diiiwn  to  the  iiycs,  one  set  piirallcl  to  tiie  axis  of  llm  iiisi  ct, 
tlie  otliiT  pi'r|ieiidi(!ul,'ir  to  the  Haine. 

The  lines  of  juncture  of  the  t^yes  with  tlie  iiiterofiilar  siirfneo,  called  ocitlur 
Unix,  aro  ;,'i'ner;illy  ncai'ly  sfriiijjlit,  and  liavc  vaiioiis  di'^^rccs  of  (jonvcr^'enue 
in  the  diU'erent  species.  This  is  indicated  liy  tin'  niniilxT  of  h(^ad-l('n(,'lhs, 
tlie  iioiii  of  junction  of  tln'sc  lines  if  produced,  would  he  distant  from  the 
anterior  niar};in  of  tlic  lal)runi. 

The  nunihi'rs  placed  after  the  various  localities  indicate  the  nnnilier  of 
specimens  from  each,  respectively. 


Tilt'  genera  and  subgcuem  within  our  launal  limits  may  bu  tabu- 
lated as  follows  : — 

Parnglossae  not  constricted  at  base;  ;j;enae  of  liead  lar;,'e DitlllOllS. 

I'arafjlossae  stronply  constricted  at  base;  genae  generally  absent,  sometimes 
visible  from  above,  thouj;li  very  small. 
Fourth  tarsal  joint  simple  or  but  slightly  enlarged,  not  having  well-defined 
elongated  lobes. 

Last  joint  of  antennae  longer  than  the  i)enultiniate 8teilll8. 

Last  joint  of  antennae  short,  in  the  i\iales  much  shorter  than  the  i)enul- 

timate Suli-gen.  Mutiiius. 

Fcnirth  tarsal  joint  distinctly  bilobed AreilS* 

DIAIVOVS  Saniouello. 

In  tliis  gcnijs  tiiere  are  two  distiiu!t  type?;,  viz.:  rarnhsrerts  Oyll, 
and  nitidiilus  Lee,  to  each  of  wliieli  there  may  be  considered  as 
belonging  two  species,  closely  allied,  it  is  true,  but  still  distinct  as 
far  as  can  be  judged  from  the  material  at  hand.  In  appearance  the 
species  are  robust,  of  a  dark  steel-blue  color,  having  on  each  elytron 
a  large  reddish-flavate  spot.  The  eyes  are  much  smaller  than  in 
8tenus,  and  leave  a  large  portion  of  the  head  exposed  behind  them  ; 
tlie  distance  between  the  eyes  is  much  greater  than  in  any  of  tiie  otiier 
genera  of  tlie  group  in  our  fauna.  The  antennae  are  very  long  tind 
slender,  and  the  abdomen  very  strongly  margined  at  the  sides.  Our 
species,  three  in  number,  may  be  tabulated  as  follows : — 

Fourth  and  fifth  joints  of  antennae  (^qual  in  length  or  extremely  nearly  so. 
Punctuation  very  sparse  ;  elytra  scarcely  longer  than  wide. 

1.  nitiflulus. 
Punctuation  very  dense  and  fine  ;  elytra  distinctly  longer  than  wide. 

2.  clialylieus. 
Fourth  joint  of  antennae  distinctly,  longer  thin  the  fifth;   punotuation  of 
elytra  sparse,  strong ;  elytra  distinctly  longer  than  wide. 

3.  zepliyrus. 


I      ! 


COI-EOI'TERA. 


(t 


1.  !>•  Iiitiilllllis  I.<'(^ — I'nlit' .cciici'  fine,  siil)-ri'i'Uiiil)itiit,  hjiaisi',  vi-ry 
incoi\H\tU\un\x,  Head  rntlit'r  Inrr  .< ;  intfroculnr  Hurfncu  rnint'il  Hli^rlitly  nbovf 
tlic  cyi's,  with  two  vtTv  il('i'|p'y  imiircsscil,  lirondly  riiiiiulcrl,  Idiiuitiiclinal 
iiiiliicssioiis  (liviiliiig  it  I'liuiiily;  iiiti'iiiii'diali'  siiit'aco  .stroiij;ly  fiinl  fvciily 
(•(invfX  ;  luinctiirf'H  lint',  evenly  diMtiildited,  distniit  at  nil  jjoiiitH  liy  xliglitly 
iiKire  tli.'iii  their  nwn  v,  idthn,  iiiterKpaces  tint  ;  eyes  rather  small,  ])n>iiiiiieiit ; 
genai-  long,  eoiitiiiu' lis  in  curvature  witii  tlie  eye;  anteiiiiai' tliree-fuiMtlis 
longer  than  f'.;>' wMlli  of  head,  lilaek,  rather  slender,  club  ilnrk  fuscous; 
third  joint  t  "-lia.f  longer  than  the  fourth,  foiirtli  and  fd'tli  efjual  in  length, 
each  joint  enl.irg  •(!  toward  its  tip  ;  maxillary  ]ial|)i  long  and  slender,  jiiceous- 
Mack  tludughoit.  Prothorax  arciiately,  rapidly,  and  I'veidy  ineri'asing  in 
%vidth  to  the  middle,  where  it  is  slightly  narrower  than  long;  sides  thence 
I'eelily  convergent  posteriorly,  nt  first  sinuntt* ;  Imsal  angles  hroailly  rounded  ; 
anterior  and  posterior  margins  eciiial  in  li-iigth  r.nd  curvature,  feehly  aicuate  ; 
surface  transversely  and  feehly  imj)ressed  just  li(diind  the  ajiex,  strongly 
tuberculnto  near  «nch  bnsnl  angle;  finely,  distantly,  and  evenly  punrtnte, 
intersiiaces  flat,  shining,  minntely  reticulated.  Elytra  at  liase  just  visilily 
narrower  than  the  head;  sides  feehly  divergent  posteriorly,  alioiit  eijual  in 
length  to  width  at  haso,  nearly  straight;  suture  ahout  one-flftn  longer  than 
the  pronotiim  ;  surface  fe(d)ly  impressed  on  the  suture  toward  the  hase, 
coarsely,  s])arsely,  and  nearly  evenly  j>uiicture(l  ;  punctures  rounded,  gene- 
rally distant  by  more  than  twice  tludr  own  widths,  interspaces  shining, 
nearly  Hat  ;  flavate  spot  beginning  slightly  before  the  middle  of  each  idytron, 
extending  as  an  oval  jiosteriorly  and  outwardly.  IJorder  of  abdominal  seg- 
ments very  strong.  Legs  long  and  slender,  black,  pubescence  fulvous;  first 
joint  of  the  posterior  tarsi  distinctly  longer  than  the  next  two  tos^Ltlier. 

Male.. — Posterior  edge  of  the  fourth  ventral  segment  jnst  visibly  emarginate 
in  its  middle  two-fifths,  contiguous  surface  feel)ly  flattened;  fifth  segment 
emarginate  in  it.s  middle  two- fifths  at  apex,  emargination  nearly  evenly 
rounded,  abont  ten  times  as  wide  aa  deep,  contiguous  surface  strongly 
flattened  throughout;  sixth  segnnuit  deeply  and  broadly  sinuate  at  a])ex, 
sinus  evenly  rounded,  slightly  more  than  twice  as  wide  as  deep  ;  seventh 
segment  transversely  truncate  at  tip,  lateral  spines  very  strongly  developed. 

FfiiKilc. — Sixth  segment  somewhat  angularly  produced  at  tip. 

Length  4.5  nan. 

"White  Mts.,  New  Hampshire,  8;  Garland,  Colorado,  10. 

The  commonest  of  our  .spe(Mes  of  this  genus;  when  its  localities 
are  t'ciind,  it  seems  to  he  numerous,  hut  these  are  very  seldom  dis- 
covered. 

The  head  in  this  species  is  smaller  than  in  zepiiijrus. 


2.  D.  clialybeus  Lee. — Form  robust.  Pubescence  very  fine,  sub-recum- 
bent, rather  close,  dark  piceous-brown,  inconspicuous.  Head  large  ;  inter- 
ocular  surface  having  two  longitudinal,  broadly  rounded,  and  deep  impres- 
sions ;  intermediate  suirface  strongly  and  very  evenly  convex  ;  punctures 
very  fine  and  close,  evenly  distributed  over  the  entire  surface,  rather  fe(d)ly 
impressed,  generally  separated  by  their  own  widths  ;  eyes  narrow  ;  antennae 


10 


NORTH    AMKUICAN 


slightly  longer  tlian  tho  hti.'id  ami  jx-othoriix  togctlusr,  piceons-Mack,  diili 
slightly  paler;  third  joint  two-thirds  longer  than  the  fourth,  fourth  and  fifth 
sub-eijual ;  joints  scareely  enlarged  at  tips;  maxillary  palpi  long  and  very 
slender,  pieeous-hrown,  tips  of  lirst  and  third  joints  paler.  Prothorax  arcu- 
ate y,  rMi)i<lly,  and  nearly  ((venly  increasing  in  width  to  a  i)oint  ilistinctly 
benind  tin-  niiddh;,  where  it  is  nearly  as  wide  as  long  ;  sides  thence  very 
feehly  convergent  posteriorly  and  somewhat  feebly  sinuate;  basal  angles 
rather  prominent ;  anterior  margin  much  shorter  than  the  jiosterior,  ecjually 
and  very  feebly  arcuate;  surface  very  feidily  and  transversely  imprijssed 
just  behind  the  a,<ex,  broadly  and  feebly  tiiberculate  near  •■ach  basal  angle, 
very  convex  in  the  middle  ;  pronotum  narrowly  margined  anti'riorly  and 
posteriorly  :  punctures  very  line,  distant,  and  (!Xtrenitdy  hndile  in  tlie  middb', 
much  coarser  and  closer  near  the  base.  Elytra  at  base  about  e([ual  in  width 
to  the  head  ;  sides  rather  feebly  divergent  i)Ohl"riorly,  very  slightly  longer 
than  the  wiilth  at  base,  moderately  arcuate  ;  together  broadly  and  moderately 
emarginat((  bcdiind  ;  suture  fully  ne-half  long(U'  than  the  ])ronotum  ;  surface 
broa<lly  imjjressed  on  the  suture  in  the  basal  half,  also  feebly  impressed 
near  the  humeri ;  punctures  moderate  in  size,  very  evenly  distributed,  dis- 
tt  by  slightly  less  than  their  own  wiiltlis.  Abdominal  Ixuiler  strong, 
91.  -  igly  retl(!xed.  Legs  moderate  in  length,  viu-y  slender,  l)lack,  tarsi  long 
and  slender  ;  first  joint  of  the  posterior  slightly  longer  than  the  next  two 
together,  scu'ond  much  longer  than  the  tliird. 

Male. — Fourth  ventral  segment  not  modilied;  fifth  feebly  emarginat(^  in  its 
miildle  third  at  apex,  emargination  evenly  rounded,  nearly  twelve  times  as 
wide  as  deep,  contiguous  surface  strongly  tlattened,  or  broadly  and  feebly 
iinprc^ssed  throughout ;  sixth  segment  strongly  sinuate  at  tip,  sinus  much 
vrider  and  more  broadly  rounded  thiin  the  ai)iees,  almost  semicircular,  nearly 
two  and  one-half  times  as  wid(!  as  dee])  ;  seventh  segment  transversely  trun- 
<  ■  te  at  tij),  lateral  spines  very  long  and  slender. 

Feniiile. — Sixth  segment  obtusely  produced  at  the  immediate  apex,  sides 
feebly  sinuate  behind  ;  seventh  segment  strongly  arcuate  at  tip. 

Length  4.7  nnn. 

Lake  Superior,  7. 

The  elytrul  spot  is  circular,  reiMisli-flavate,  begins  slightly  beliind 
the  middle  of  each  elytron,  and  is  much  nearer  the  exterior  tlian  tiie 
interior  margin. 

The  above  description  is  taken  from  Dr.  LeConte's  type,  which  is 
a  female. 

This  species  greatly  resembles  the  European  canrnlescens  CJyll.,  but 
differs  from  it  in  the  structure  of  the  interocular  surtace  of  tiie  head, 
this  being  relatively  much  narrower  in  tiie  latter,  which  also  has  the 
central  convexity  much  wider  in  relation  to  the  lateral  portions.  I 
have  before  me  only  a  female  of  C(erulcsce7is,  hi\t  in.  sev<!ral  additional 
characters  it  differs  from  chahjheiis  to  a  considerable  degree. 

In  tiie  former  the  fifth  segment  is  roundly  and  very  distinctly 
emargiiiati;  in  its  middle  third  at  apex,  the  sixth  segment  is  much 


COLEOPTERA. 


11 


narrower  and   very  {xcutcly  produced  at  apex,  with  tlie  sides  not 
sinuate,  but  arcuate  behind. 

Tiie  spots  are  hirger,  more  irregular,  and  surrounded  by  a  V(!ry 
distinct  lialo  of  reddish-pur|)I(),  wiiich  is  not  observabh;  in  our  species  ; 
the  elytral  punctures  vary  more  in  size,  are  coarser  and  more  distant 
as  a  ruh',  and  I  lie  elytra  are  more  narrowly  and  dee[)Iy  impressed  along 
the  suture  in  ccernlescens.     Our  species  is  decidedly  more  robust. 

3.  D.  ZepliyrilS  n.  sp. — Form  nearly  as  in  nilUhtliix,  P  ibesoence  ex- 
cessively sparsi',  loiif,',  more  dense  and  very  fine  on  the  aI)ilo)nen  ;  snrface 
shining,  minutely  reliuulated  ;  spaees  hetween  the  punctures  nearly  flat. 
Head  large;  intorocular  surface  trilobed  by  the  very  strongly  impressed 
hiniritudinal  suli'ations  ;  internif-diate  snrfatte  strongly  an<l  nearly  evcMily 
convex  ;  punc^tures  very  fine,  distant  by  nuich  more  than  their  own  widths 
on  the  convex  jwrtions,  closely  crowded,  nearly  coalescent  in  the  sulcations; 
antennae  as  long  as  the  head  and  protliorax  together  ;  third  joint  hut  slightly 
more  than  one-third  longer  than  the  fourth,  fourth  distinctly  longer  than  the 
fifth,  joints  one  to  eight  black,  joints  of  club  elongated,  much  paler  ;  maxil- 
lary i)ali)i  long,  slender,  piceous-black  throughout,  last  joint  densely  pubes- 
ce:it.  Prothorax  widest  slightly  behind  the  middle,  wher(i  it  is  much  nar- 
row(U'  than  long,  suddenly  and  feebly  constricted  just  btdiind  the  apex  ;  sides 
strongly  sinuate  posteriorly  ;  basal  angles  nearly  right ;  posterior  margin 
slightly  long(>r  and  less  arcua(e  than  the  anterior,  the  latter  feebly  arcuate  ; 
surface  strongly  and  transversely  impressed  just  behind  the  apex,  very 
strongly  tuberoulate  near  each  basal  angle,  very  strongly  and  rather  abruptly 
convex  in  the  middle  of  the  disk  ;  j)unctures  very  minute  and  sparse  in  the 
middle,  much  coarser  and  closer  toward  the  base  ;  disk  of  pronotum  termi- 
Tiated  anteriorly  and  posteriorly  by  a  narrow,  acntts,  elevated  bonh-r.  Elytra 
at  base  as  \*'ide  as  the  head  ;  sides  very  feebly  divergent  posteriorly,  distinctly 
longer  than  the  width  at  base,  feebly  arcuate  toward  the  tip  ;  together  nar- 
r.nvly  and  very  deeply  emarginate  behind  ;  suture  one-third  longer  than  the 
pronotum  ;  surface  of  each  elytron  impressed  along  the  sutural  border  toward 
the  base  ;  punctures  coarse,  round,  nearly  evenly  distributed,  distant  by 
much  less  than  twice  their  own  widths.  Abdominal  border  very  strong. 
Legs  long  and  slender ;  tibiae  toward  tips,  and  tarsi  clothed  densely  with 
fulvous  pubescence.  First  joint  of  the  posterior  tarsi  equal  in  length  to 
the  next  two  together. 

Mule, — Posterior  edge  of  fourtl)  vi".itral  segment  just  visibly  emarginate  in 
its  middhi  fourth,  contiguous  surface  feebly  llattened  ;  fifth  segmijut  nearly 
triangularly  emarginate  in  its  middle  third  at  apt^x,  eraargination  seven  times 
as  wide  as  deep,  contiguous  surface  strongly  flattened  throughout ;  sixth 
segment  deeply  and  broadly  emarginate  at  tip,  exterior  angles  of  emargina- 
tion  pronounced,  sides  nearly  straight,  bottom  broadly  rounded,  about  twice 
as  wide  as  deep  ;  seventh  segment  transversely  truncate  at  tip,  lateral  spines 
strong. 

Female. — Posterior  edge  of  fifth  ventral  segment  very  feebly  and  narrowly 
emarginate  in  the  middle  ;  sixth  segment  acutely  produced  at  tip. 

Length  4.8  mm.  »"    '■;..• 


t  • 


12 


NORTH    AMEUICAN 


Vancouver  Island,  British  Columbia,  7. 

The  most  salient  feulures  in  the  differential  characters  of  the  two 
s|)eci(^s,  iiitldulns  and  zephi/riis,  are  the  structure  of  the  antennae, 
punctuation  of  tlie  iiead,  iironotiim,  and  elytra,  structure  of  tlie  hind 
tarsi,  relative  lengths  of  the  proiiotum  and  elytra,  the  degree  of 
emargination  of  the  latter  behind,  and  slight  differences  in  the  sexual 
characters  of  the  male  and  female.  The  antennal  club  is  much  more 
slender  and  paler  in  color  in  the  latter  sitecies. 

I'he  species  are  evidently  closely  allied,  and  whether  the  insular 
conditions  under  which  zephyrus  has  existed,  have  caused  differences 
as  announced  above,  in  individuals  originally  of  llw;  same  species,  is 
an  interesting  pr()l)lem,  which  time  alone  can  aid  us  in  solving. 

Tiie  spots  in  zephyrus  begin  slightly  behind  tlie  middle,  are  nearly 
circular  in  outline,  and  are  distinctly  neansr  the  ext(;rnal  than  tlie 
internal  edge  of  the  elytron. 


STEMUS  LatroiUe. 

The  species  of  this  genus  are  extremely  numerous,  and  often  very 
closely  allied.  Our  representatives  are  all  included  in  the  three  fol- 
lowing divisions  : — 

Abdomen  strongly  and  distinctly  margined. 

Each  (ilytron  having  a  spot  of  orange  tint  near  the  middle  of  its  disk. ...A. 
Elytra  immaculate B. 

Abdominal  border  rciluced  to  the  mere  line  of  juncture  of  the  dorsal  and 
ventral  surfaces  of  the  segments,  only  distinct  on  tlie  first  segment,  and, 


v> 


in  some  cases,  at  the  bases  of  the  remainder C.  v* 


'  Division  A« 

In  this  division  the  species  are  few  in  number,  and  among  the 
largest  of  the  genus.  They  are  recognizable  at  once  by  the  inore  or 
less  reddish-orange  colored  spot,  of  form  varying  according  to  the 
species,  situated  near  the  middle  of  each  elytron.  IMie  legs  are,  as 
a  rule,  long  and  very  slender,  and  they  are  nearly  all  rapid  in  tiieir 
movements. 

The  species  occurring  in  North  America,  north  of  the  Mexican 
boundary,  are  seven  in  number,  and  may  be  classified  as  follows : — 

Femora  black.       *  '  "' 

Spots  extremcily  small,   beginning  distinctly  behind   the  middle  of  the 

elytron;  form  very  slender  1.  punctiger* 

Spots  much  larger,  beginning  at  the  middle  of  the  elytron  ;   form  more 

robust;  spots  somotimea  angulated 2.  biliuiictatlis. 


COLKOI'TEKA. 


i;; 


FeiiKir.'i  iKit  lilack,  vriryin;,'  in  cdldr  frdia  dark  ))ii'c()UH-brown  to  juilc;  trslii- 

CI'OIIS. 

Hcail  wiili'i-  than  tlio  i-lytra 'i.  colon. 

llcail  iMjiial  ill  widtii  to  thu  elytra. 

t<|)(its  stnnif;ly  liiloticil 4.   M'llif'er. 

Spots  circiilai'  or  ovoiclal. 

Ninth  and  tciilli  joints  of  niiti'iinac  of  ciinal  liMi^'th.-.Ti.  sriliicoloil. 
'I'cnth  Joint  of  antiMiiiai'  iiincli  Ioii^'it  tlian  tin-  niiitli. 

Spots  sitnatcd  very  near  tlic  cxtciiial  edges  of  tin- elytra. 

li.  gt'llllllClls. 
Spots  situated  very  near  the  nii(hUe  of  the  elytra. 

7.  bileiifiKiitiis. 


1.  S.  imiictiger  n.  sp.  (Fauvcil  MS.). — Form  moderately  slender. 
Pnl)es(;eiic('  rather  sparse,  very  short,  semi-erect,  setifonn,  and  eiiiereoiis. 
Head  rolmst,  notahiy  less  than  twiee  as  \vi<le  as  loiij;  ;  interocniar  snrfaee 
two  and  one-half  times  as  wide  as  tlu^  ey(f,  moderately  excavated,  liindy  and 
rather  closely  punctate  ;  lon{,'itudinal  elevation  hroad  and  distinct,  bordered 
liytwo  shariily  marked  siileations  ;  ocular  lines  meetiiifj;  at  ahont  two  li'iii,'ths 
in  advance;  antennae  slender,  minh  loii},'er  than  width  of  head,  hasal  joint 
Mack,  remainder  <lark  ])iceous,  clnh  moderate  ;  third  joint  twiee  as  lonj,'  as 
the  fourth  and  sliijlitly  i<)ii^,'er  than  the  foui  h  and  lifth  to;;etlier,  sixtii  an<l 
seventh  e(|ual  ill  li'ii^'tli,  eighth  joint  thicker  than  the  sixth.  Joints  of  cliili 
nnifornily  increasing  in  length,  last  two  e(jnal  in  thickness,  last  joint  acumi- 
nate at  ti)) ;  first  Joint  of  maxillary  j)al]ii  testaceous,  second  and  third  piceoiis- 
hlack.  Prothorax  somewhat  elongate,  widest  at  a  distance  heliind  the  ante- 
rior margin  e(|iial  to  one-sixth  the  length,  sides  thence  parallel  and  very 
slightly  ar(Miate  for  a  distance  ecinnl  to  one-half  the  length,  and  rather 
rajiidly  convergent  and  sinuate  for  tin;  remaining  distance  posteriorly;  width 
ei]nal  to  three-fourths  that  of  head,  ah(uit  oiie-lifth  narrower  than  long; 
anterior  margin  slightly  longer  and  more  arcuate  than  the'  jiosterior  ;  surface 
broailly  and  feebly  impressed  on  the  Hanks  at  the  middle,  liiiely,  extremely 
closely  and  somi^what  regularly  ]iuncliired:  canalieulation  narrow  and  very 
shallow,  coniniencing  slightly  before  the  middle  and  extending  posti'riorly 
one-third  tlie  total  length.  Elytra  at  base  as  wide  as  the  head,  sides  just 
]ierce|itibly  divergent  posteri<irly,  mni'h  longer  than  wid(! ;  together  broadly 
and  very  strongly  emarginate  ])osteriorly  with  the  lateral  eniarginatioiis  very 
feeble  ;  suture  nearly  one-fourth  as  long  again  as  the  pronotiiiii ;  surfac« 
convex,  rather  finely,  evenly,  and  extremely  clos(dy  punctate,  interspaces 
acute  ;  on  each  elytron  there  is  a  very  small,  oblong,  orangi^yellow  spot  Just 
bebind_  the  middle,  and  notably  nearer  the  e.xterior  than  the  interior  edge. 
Abdominal  segments  ib-creasing  gradually  and  uniformly  in  width,  first 
nearly  as  wide  as  the  contiguous  elytra,  border  prouunent;  surface  convex, 
closidy,  feebly,  and  coarscdy  ))unctulat(! ;  transverse  c.'iri)>a<'  vc*  ■.'i!S])'d. 
Legs  long  and  very  slender,  black  throughout  ;  lirst  loiiit  of  posterior  tarsi 
twicft  as  long  as  tlio  second,  not  eciual  to  the  next  ;■..;>;  j  together,  joints  very 
slender  and  cylindrical.  Under  surface  of  abdomen  polished  and  extremely 
linely  punctu'ite. 


liO 


!i 


14 


NORTH    AMERICAN" 


Male. — Posterior  edge  of  fiftli  ventral  segment  feelily  emarginate  in  its 
iniiiiUc  tliird,  emargination  evenly  rounded,  very  feeble,  short,  f.nd  not 
aliniptly  terniinatud,  surface  of  segment  eylindrieally  impressed  for  a  width 
equal  til  that  of  the  emargination,  impression  gradually  hecoming  extinct 
anterinrly;  sixth  segment  very  broadly  and  triangularly  incised,  notch  four 
times  as  wide  as  deep,  angle  very  slightly  rounded,  surface  of  segment  very 
fecMy  impressed  ;  seventh  segment  very  broadly  emjirginate  at  apex. 

Ffiitiili . — Unknown. 

Length  3.S  mm. 

Garland,  Colorado,  2. 

The  specimen  wliicli  I  liave  associated  with  the  type  as  above 
described,  differs  from  it  in  several  important  points,  viz.: — 

The  prothorax  gradually  increases  in  width  posteriorly  and  is 
widest  behind  the  middle,  the  club  of  the  antennae  is  more  compact, 
the  tarsi  are  paler  and  slightly  more  robust,  the  emargination  of  the 
sixth  segment  is  apparently  more  feeble  and  rounding,  tiie  upper 
surface  has  a  more  metallic  reflection,  and  the  general  Ibrm  is  more 
robust. 

I  believe  these  diflerences  indicate  at  least  a  well-marked  variety, 
but  there  is  not  sufficient  material  at  hand  to  decide  upon  their  specific 
importance. 

The  surface  of  the  pronotum  and  elytra  in  the  above  type  is  of  an 
intense  black,  without  lustre  and  without  any  indication  of  the  deep 
steel-blue  tint  observable  in  hipiinctatus. 

2.  S.  bipuiictatllS  Ericlis. — Form  moderately  robust.  Pubescence  ex- 
ceedingly tine,  sparse,  recumbent,  and  cinereous.  Head  very  robust,  much 
less  than  twice  as  wide  as  long  ;  interocular  surface  deeply  excavated,  twice 
as  wide  as  the  eye,  very  finely  punctured,  Interspaces  Hat  and  not  equal  in' 
width  to  punctures  ;  longitudinal  carina  very  feebly  developed,  narrow, 
crest  impunctate;  antennal  tuberculations  very  well  developed  ;  ocular  lines 
meeting  at  one  length  in  advance ;  antennae  much  longer  than  width  of 
head,  very  slender,  black  throughout,  club  narrow  ;  third  joint  equal  in 
length  to  twice  the  fourth,  and  somewhat  longer  than  the  next  two  together, 
sixth  and  seventh  joints  equal  in  lengtli,  eighth  short,  broader  than  sixth, 
joints  of  club  of  nearly  equal  width,  ninth  and  tenth  sub-equal  in  length, 
eleventh  joint  much  longer  and  acuminate  at  tip  ;  first  joint  of  maxillary 
jjaljii  and  base  of  the  second  testaceous,  remaind(!r  piceous-black  and  densely 
pubescent.  Prothorax  increasing  arcuately  in  width  for  a  distance  from  the 
anterior  margin  equal  to  two-thirds  the  length,  where  it  is  about  three- 
fourths  as  wide  as  the  head  and  slightly  narrower  than  loug  ;  sides  thence 
rather  rapidly  convergent  posteriorly  and  very  strongly  sinuate,  anterior 
margin  longer  than  the  posterior,  equally  and  feebly  arcuate  ;  surface  almost 
evenly  convex,  finely,  very  deeply,  rather  (jvenly  and  exceedingly  closely 
punctate,  punctures  slightly  elongated  laterally,  interspaces  very  acute  ; 
canaliculatiou  narrowly  fusiform,  deep,  commencing  very  slightly  before  the 


COLEOI'TERA. 


15 


midille,  and  extending  posteriorly  a  distance  equal  to  one-third  the  entire 
leiigtli.  Elytra  at  base  very  slightly  wider  than  the  head,  sides  sli;^'litly 
divergent  posteriorly  and  (evenly  arcuate,  very  slightly  longer  than  width  at 
base;  togetluu'  broadly  and  moderately  eniarginate  jHisteriorly,  outer  apical 
(jniarginations  distinct ;  suture  but  slightly  longer  tlian  tlie  pronotum  ;  sur- 
face evenly  convex,  rather  coarsely,  evenly,  and  exceedingly  closely  punc- 
tured, punctures  elongated  longitudinally  n(!ar  the  suture,  interspaces  very 
acute;  just  behind  the  centre  of  each  elytron  there  is  a  nearly  circular 
reddisli-orange  spot.  Abdominal  segments  decreasing  uniformly'  and  very 
gradually  in  width,  first  somewhat  narrower  than  the  contiguous  elytra, 
bordi^r  moderate;  surface  convex,  finely,  feebly,  and  closely  jiunctulate ; 
transverse  carinae  not  cusped.  Legs  very  long  and  slender,  throughout 
entirely  Mnck  ;  first  joint  of  posterior  tarsi  more  than  twice  as  long  as  the 
seeon<l,  as  long  as  the  next  three  tog(^ther.  Under  surface  of  the  abdomen 
much  more  finely  pnnctulate  than  the  ujiper. 

Male. — Posterior  edge  of  fifth  ventral  segment  emavginato  in  its  middle 
third,  eniargination  evenly  rounding,  eight  times  as  v,  ide  as  deep,  s(>niewhat 
indellnitely  terminated  ;  surface  at  tirst  somewhat  strongly  and  conically, 
then  very  feebly  and  cylindrically  imjiressed  anteriorly  ;  sixtli  segment 
broadly  and  deeply  incited  at  apex,  notch  triangular,  three  times  as  wide 
as  deep,  bottom  rounded  ;  surface  very  fecddy  and  cylindrically  impressed; 
seventh  segment  deeply  eniarginate  at  tip  and  deej)ly  imjiressed  (busally, 

Femiile. — Sixth  ventral  segment  generally  evenly  rounded  behind,  and 
almost  imperceptibly  produced  at  the  apex. 

Length  4.4-r).0  mm. 

IVnnsylvaniii,  9  ;  Ohio,  2 ;  British  Columbia,  4 ;  "Washington 
Territory,  7. 

This  species  appears  to  vary  considerably ;  tiie  spots  are  sometimes 
small,  roinuled,  and  of  a  distinctly  rut'ous-orange  tint ;  in  other  speci- 
mens, generally  from  tiie  Pacific  coast,  they  are  larger,  of  a  more  pure 
liavate  color,  and  occasionally  nearly  quadrate. 

Tliere  is  one  specimen  before  me,  which  after  long  deliberation  I 
have  concluded  to  unite  with  this  species ;  it  has  the  tarsi  distinctly 
shorter  and  more  robust,  and  the  anterior  margin  of  the  prothorax 
slightly  more  arcuate,  the  entire  form  rather  more  slender,  the  sexual 
characters  precisely  the  same  ;  it  is  from  British  Columbia,  and  I 
prefer  at  present  to  consider  it  as  a  slightly  aberrant  specimen. 

S.  comma  Lee.  does  not  differ  from  this  species  to  any  perceptible 
extent. 


3.  S.  colon  Say. — Form  slender.  Pubescence  of  head,  pronotum,  and 
elytra  exceedingly  sparse  and  fine  ;  that  of  the  dorsal  surface  of  abdomen, 
short,  moderately  close,  yellowish,  and  setiform.  Head  slightly  more  than 
twice  as  wide  as  long  ;  interocular  surface  deeply  excavated,  threes  times  as 
wide  as  tlu^  eye;  longitudinal  elevation  not  well  developed;  punctuation 
close  and  deep  ;    ocular  lines  meeting  at  about  five  lengths  in  advance ; 


Ifi 


NORTH    AMERICAN 


antennae  sliMnler,  dnrk  brownish-testacoous,  slightly  longer  tliaii  tlie  uiiltli 
of  head,  club  not  well  developeil ;  tliinl  joint  one  half  as  long  again  as  tbe 
four  "i,  t'ourtli  and  liftb  cijnal,  eigbtli  very  small,  nc^aily  globular,  Joints  of 
flnl)  slightly  elongated,  tenth  about  as  long  as  the  eleventh  ;  maxillary 
paljii  vi-ry  pale  yellowish-testaeeous.  Prothorax  e(iual  in  length  to  twica 
th"'  head,  wiilest  at  the  middle,  where  it  is  (nie-tliird  narrower  than  the  head  ; 
surface  densely  and  deeply  punctate  ;  sides  paiallel  and  slightly  arcuate 
through  the  middle  half,  thence  rather  rapidly  convergent  and  sinua*.' ; 
canaliculation  very  narrow,  slioi't,  and  deep,  comTneneing  very  slightly  be- 
hind the  middle.  Elytra  at  basi?  much  narrower  than  the  heail,  and  but 
slightly  broader  than  the  base  of  the  prothorax  ;  tog<'ther  (h-eply  euiarginate 
anteriorly,  and  each  hisinnate  at  the  apex  ;  suture  e(|nal  in  length  to  the 
jironotum  ,  sides  considerably  divergent  jxisteriorly  ;  humeral  angles  rather 
well  developed;  surface  densely  and  closely  pnnc.'tate  ;  a  bilobed,  r(Miiforni, 
rtavate  spot  begins  slightly  before  the  middle  of  eac^h,  and  extends  posteriorly 
for  a  distance  equal  to  one-third  the  length,  connnencing  at  a  distance  from 
the  suture  visibly  less  than  one-half  the  width.  Abdominal  segments  de- 
creasing but  very  slightly  in  width,  rather  sparsely  punctate;  transverse 
cariuae  as  in  rciiij'cr,  with  the  lateral  cusps  rather  less  din-eloped  than  iu 
that  sjiecies.  Legs  long  and  slender,  femora  very  p;ile  ytdlowish-testaceouSj 
sha<ied  with  fuscous  at  the  outer  third;  tibiae  very  slender  ;  tarsi  slender, 
pale  testacecuis,  first  joint  of  posterior  eijual  in  length  to  th(>  next  three 
together.  Color  of  under  surface  piceous-black,  finely  and  sparsely  punctu- 
late. 

Male. — Fifth  ventral  segment  abruptly  and  deeply  emarginate  in  its  middle 
two-fifths,  ciuargination  evenly  rounded,  four  times  as  wide  as  deep,  the 
adjoining  surface  being  impressed  for  a  short  distance,  terminal  teeth  ni(id(;- 
rately  developed  ;  sixth  segment  incised  as  in  reiil/er,  though  rather  more 
broadly  ;  seventh  broailly  and  feebly  emarginate  at  apex. 

Fi'iiKili'. — Sixth  segment  broadly  and  evenly  rounded  beliind. 

Length  3.()-3.t)  mm. 

Wnsliingtoii,  D.  C,  .5;  Penington  (jiip,  Va.,  2;  Michigan,  1; 
Soiithurn  States,  .5. 

Tliis  species  is  very  closely  jiUied  to  renifer  Lee. ;  it  is,  iiowever, 
nineli  smaller  and  more  slender,  and  differs  notably  in  the  width  of 
the  head  and  punctuation  of  the  dorsal  surface  of  the  abdomen.  Tlie 
sexual  characters  are  nearly  the  same  in  both.  In  facies  the  two 
species  are  so  distinct  that  they  can  be  readily  sei)arated  by  the 
unaided  eye. 

4.  S.  renifer  Lee. — Form  rather  slender.  Pubescence  of  entire  body 
very  sparse,  scarcely  visible,  cinereous  on  the  head,  pronotum,  and  elytra, 
more  dense  but  still  short  and  setiform  on  the  abdomen,  where  it  is  slightly 
fulvous.  Head  twice  as  wide  as  long ;  interocular  surface  moderately  ex- 
cavated, densely  and  profoundly  punctured  ;  longitudinal  carina  moderatidy 
prominent ;  ocular  lines  meeting  at  two  lengths  in  advance  ;  antennae  slen- 
der, dark  brownish-testaceous,  equal  in  length  to  the  head  and  pronotum 


'*-#1 


COLEOPTEIIA. 


17 


togctliiT,  cliit)  well  (levt'loju'd  ;  third  joint  a,  littli'  more  tliiUi  oiU'-lialf  a.s  long 
again  as  tlio  fourth,  lourtli  and  lll'th  nearly  equal,  eighth  notalily  shorter 
than  tlic  seventh  ;  joints  of  cliil)  nearly  e<inal,  nioih-rately  elongati-d.  Pro- 
thorax  equal  in  lejigth  to  twiee  the  heail,  widest  at  v.iid-section  where  it  is 
slightly  narrower  than  the  liead  ;  sides  from  this  point  moderately  convergent 
jiosteriorly  aiul  slightly  sinuat(^;  surface  denstdy  |)unetate  ;  eommeneing  at 
the  niidille  and  extending  f(U'  one-fourth  the  length  there  is  a  narrow,  deej), 
canalicular  excavation,  which  grndually  disappears  posteriorly.  Elytra  at 
l)ase  as  wide  as  the  head,  together  deeply  eniarginate  anteriorly,  an<l  each 
hisinuate  posteriorly  ;  sides  sliglitly  divergent  jiosteriorly  ;  luinieral  and 
apical  angles  rounded  ;  length  of  suture  perceiitihly  greater  than  tliat  of 
pronotum,  aVid  equal  to  the  posterior  width  of  elytra  '.igethtM-  ;  surface 
densely  punctate,  each  elytron  slightly  swolhMi  ii\  the  middle  at  the  haae, 
these  elevations  gradually  disajipeai'Ing  posterioilv  ;  a  large  reuifortn,  orange- 
yellow  spot  occupies  the  middle  posterior  fourth  of  each  elytron,  connnencing 
at  a  distance  from  the  suture  nearly  e(iual  to  one-half  its  width.  Abdominal 
segments  decreasing  hut  very  slightly  in  width  posteriorly;  horder  very 
prominent  ;  dorsal  carinae  very  slightly  sinuate  posteriorly,  acutely  tri- 
cuspid. Legs  long  and  slender;  femora  very  pale  testaceous,  with  a  hroad 
hand  of  pale  fuscous  near  thi^  tijis  :  tihiae  very  slender  and  slightly  darker 
than  the  femora  ;  tarsi  vt'vy  slender,  jidsterioi'  equal  in  length  to  three-fourths 
the  tihiae,  first  and  second  joints  with  a  touch  of  fuscous  at  the  tips,  fifth 
joint  almost  entirely  pale  fuscous  ;  first  joint  equal  in  length  to  the  next 
three  together.  First  joint  of  maxillary  palpi  dark  iuscous,  second  and 
third  j)ale  yellowish-testaceous.    Kntire  under  surface  of  hody  piceous-hlack. 

M(i!( . — Posterior  edge  of  fifth  ventral  segment  inoderately  eniarginate  in 
its  middle  third,  with  the  surface  bordering  on  the  emargination  slightly 
impressed;  sixth  segment  triangularly  incised  in  its  middle  half,  notch  three 
times  as  hroad  as  deep,  with  its  anterior  angle  slightly  rounded  ;  seventh 
segment  broadly  eniarginate  at  apex. 

Fi'iiKilc. — Sixtli  segment  broadly  and  evenly  rounded  behind. 

Length  3.9-5.0  mm. 

Columbus,  Texas,  ;> ;  Arizona,  21. 

A  fine  species ;  the  orange  spot  is  often  very  brilliant. 

fi.  S.  semicolon  Lee. — Form  rather  slender.  Pubescence  of  entire  body 
very  short  and  sparse,  flavo-cinereous  in  color.  Head  moderate,  scarcely 
twice  as  wide  as  long  ;  interocular  surface  well  depressed,  three  times  as 
wide  as  the  eye,  deeply  and  closely  ]iuuotured  ;  longitudinal  elevation  well 
marked;  ocular  lilies  meeting  at  about  two  lengths  in  advance;  antennae 
slender,  but  little  longer  than  width  of  head,  uniformly  deep  fuscous,  club 
distinct ;  third  joint  one-half  as  long  again  as  fourth,  eighth  scarcely  more 
than  one-half  as  long  as  the  seventh,  eleventh  longer  than  the  tenth,  joints  of 
club  slightly  elongated  ;  maxillary  paipi  testaceous,  second  joint  rather  paler 
at  base.  Prothorax  widest  at  the  middle,  where  it  is  four-fifths  as  wide  a.s 
the  head  ;  length  nearly  ecjual  to  twice  that  of  head,  one-fifth  longer  than 
broad;  anterior  and  posterior  margins  slightly  arcuate;  sides  evenly  and 
divergently  arcuate  before,  moderately  convergent  and  slightly  sinuate  be- 


Stenini. 


2 


LIBRARY 

eNTOMOLOQICAL  BRAN0fr4 

DEPARTMENT  Of 

AGRICULTURE 

OTTAWA. 


18 


NORTH    AMKRIOAX 


liiiid  niirl-scction  ;  MM'fiu.'i*  (Iccply  and  cdost-ly  iiiiiictiircd,  iiifcrsiinccH  iinrrow 
and  sliininj; ;  comnii^ncing  at  tlic  niiddl<'  ami  ('yt('n<lin},'  iiostcrioi'ly  a  distancf 
(■i]nal  to  aliimt  onc-fonrtli  flic  It-nf^lli,  tluTc  is  a  narniw  and  dci'ii  canalicnla- 
fiiin.  Elytra  at  base  abont  ('([nal  in  widtl;  ti)  tin;  ln-ad,  tojjctniT  deeply 
(Mnarginatt!  anteriorly,  cacli  Msinnate  jiosteriorly  ;  sides  divergent  ponte- 
riorly,  evenly  areuate  ;  linnieral  an;,!es  soniewliat  ronnded  ;  snrl'aee  coarsely 
and  closely  jmnctate,  and  loiigitudinally  channeled  ;  jn  U  behind  tl.'e  midille 
of  each,  there  is  a  very  small  orange  spot.  Abdominal  segments  decreasing 
very  gradnally  in  width  ]io.sti'ii(n'ly  ;  sides  of  each  markedly  sinnate  ;  surface 
rather  linely  and  closely  imnctate;  transverse  ca;'inae  tricusjiid  posteriorly, 
with  the  intervals  sinuate  ;  middle  cusps  very  narrow  and  cariniform.  Legs 
moderately  long  and  slencler  ;  femora  and  tibiae  fiisco-testaueous  :  tarsi  deep 
fuscous,  lirst  joint  of  jiosterior  nearly  e(|ual  in  length  to  the  next  three 
together.     Under  surface  of  body  piceous-black,  generally  finely  punctulate. 

Malf. — Third  ventral  segment  fcbly  ini  ircssed  throughout  the  middle 
third,  margin  entire;  fourth  segment  very  !>  ebly  sinuate  in  its  miildle  two- 
fifths,  surface  distinctly  impressed  anteriorly  for  the  same  width,  borders  of 
impression  densely  ciliate  :  jHisterior  edge  of  the  fifth  segment  broadly  emar- 
ginate  in  its  middle  two  fifths,  emargination  evenly  rounded,  (<ver  four  times 
as  wide  as  deej),  surface  impressed  throughout  in  the  form  of  a  broad,  rather 
deep  channel,  with  the  borders  densely  ciliated  ;  sixth  segment  deeply  and 
acutely  enuirginate  in  its  middle  third  at  apex,  di^jth  of  notch  equal  to  its 
width,  angle  rounded,  surface  of  segiu(;nt  not  iuipressed  ;  seventh  segment 
broadly  eniarginate  at  apex. 

Female. — Sixth  segment  convex  ;  length  equal  to  bieadtb  at  base,  sides 
evenly  rounding  excejjt  at  the  apex,  which  is  feebly  sinuate. 

Length  o. 8-4.4  mm. 

White  Fish  Point,  Michifran,  r» ;  wcsti'in  shore  of  Luke  Sn|)erior,  2  ; 
Mur(|uette,  ^lichij^an,  4  ;  District  of  Cohimhia,  1  ;  .Southern  Slates, 
1  ;  Escunaba,  Michigan,  1. 

Kemarkahle  among  the  spotted  species,  for  tlie  well-marked  sexual 
characters  of  both  nude  and  teniale.  The  spots  are  scarcely  visible 
in  some  specimens. 


0.  S.  geniineilS  n.  sj). — Form  rather  slender.  Pubescence  of  head, 
pronotuni,  and  elytra  scarcely  visibk',  more  dense  on  the  head  ;  that  of 
dorsal  surface  of  the  abdomen  a  little  longer,  slightly  fulvous,  setiform,  very 
sparse.  Head  twice  as  wide  as  long;  interocular  surface  moderately  exca- 
vated, about  twice  as  wide  as  the  eye,  densely  punctured  :  longitudinal  ridge 
rather  well  developed  ;  ocular  lines  meeting  at  one  length  in  advance  ; 
antennae  about  equal  in  length  to  width  of  head,  rather  slender,  deep 
brownish-testaceous,  club  not  prominent ;  third  Joint  one-half  as  long  again 
as  the  fourth  ;  fourth  and  fifth  ('(jnal  ;  joints  of  clul)  <>qual  and  somewhat 
elongated  ;  maxillary  palpi  slender,  flavate  throughout.  Prothorax  twice  as 
long  as  the  head,  widest  slightly  before  the  miildle,  wlier(!  it  is  slightly 
l)roader  than  the  interocular  surface  ;  sides  from  widest  section  feebly  con- 
vergent and  very  slightly  sinuate  posteriorly;    surface  deeply  and  closely 


COLEOI'TKUA. 


19 


narrow 

nlifiiliv- 
dm-ply 
t  jxwtt'- 
(Miarst'ly 
■  inidfllu 
ereaHiiig 

;    slirflKt' 

iterioily, 
n.  LegB 
arsi  (Ift'p 
•xt  three 
nctulate. 
i.  middle 

ddlf  tAVO- 

liordcrH  nf 
dly  I'lnar- 
lour  tiiiicH 
ad,  rallier 
eeply  and 
[nal  to  itH 
li  segmi^nt 

l)ase,  sidfs 


levior,  2 ; 
States, 

'i\  sexual 
V  visible 


of  iK-ad, 
tliat  of 
form,  very 
atfly  exca- 
diiial  ridge 
advance ; 
iidcr,  deep 
long  again 
somewhat 
ax  twiee  as 
is  slightly 
feel>ly  con- 
aiul  closely 


pniK'tured  and  channeli'd  ;  upon  each  side  of  the  proiiolmn  near  the  haso 
there  is  a  shallow  impression  ;  caiialiculation  nearly  olisolete,  I'oninieni'ing 
at  the  middle  and  not  attaining  tht^  hase  ;  anterior  and  jxisterior  margins 
arcuate.  Elytra  at  hnse  narrower  than  the  liead  ;  togt^ther  hroadly  emargi- 
nate  at  thci  hase  and  apex  :  sides  fiMdily  arcuate  and  slightly  divergent  posttv 
riorly ;  suture  e(|ual  in  length  to  the  pronotum  ;  surface  very  deeply  and 
<'losely  luinetun'd  aud  channeled  ;  near  the  ))ase  of  each  tdytron  th(!re  is  u 
slight  elevation  ;  orange-yellow  spots  small  and  nearly  (urcular,  very  close 
to  tlie  outer  margins,  and  just  hehiiid  tli(?  mid<ile.  Abdominal  segtnents 
<lecreasiug  very  gradually  in  width  posteriorly;  hoi'der  di-^tinct  on  the  first 
four,  very  narrow  (Ui  the  fifth  and  sixth  ;  punctures  rather  lino  and  distant, 
heconiing  very  tine  posteriorly  ;  transverse  cariiiae  well  developed,  tricuspid, 
intervals  distinctly  sinuate.  Legs  rather  Ion;,,  very  slender,  pale  hrownish- 
testaceous  ;  femora  darker  in  the  outer  half;  tarsi  slender;  first  joint  of 
posterior  rather  longer  than  the  next  three  together.  Coxae  darker  than  the 
femora.      Under  suiface  piceous-lilack,  feehly  punctate,  shining. 

Miilf. — Fourth  ventral  segment  very  feehly  emarginate  in  its  middle  two- 
fil'ths,  surface  hordering  eniiirgination  <leeply  impressed,  border  of  imjjressed 
area  dens(dy  clothe<l  with  long  setae  ;  fifth  segment  emarginate  in  its  middle 
third,  emargination  evenly  roiinded,  four  times  as  wide  as  deep,  contiguous 
surface  hroadly  channeled,  border  of  channel-like  imjiression  ciliated;  sixth 
segment  roundly  emarginate  in  its  middle  third  at  apex,  width  of  emargina- 
tion hut  slightly  (jxceediiig  its  depth  ;  seventh  segment  emarginate  at  apex. 

Female. — Unknown. 

Length  4.0  mm.  ' 

Georgia,  1. 

A  veiy  distinct  species  in  every  respect. 

7.  S.  bilentigatlis  n.  sp. — Form  moderately  robust.  I'uhescencH  of 
entire  body  very  short,  fine,  aud  setiform,  extrem(dy  sjiarse.  Head  well 
developeil,  twice  as  wide  as  long  ;  interocular  surface  well  excavated,  three 
titnes  as  wide  as  the  eye,  deeply  and  closely  punctured  ;  longitudinal  eleva- 
tion moderately  prominent  ;  anteiuuu^  much  longer  than  the  width  of  head, 
slender,  very  deep  I'usco-iiiceous,  darker  toward  tiji,  club  well  develo])ed  ; 
third  joint  slightly  more  than  one-third  as  long  again  as  the  fourth,  fourth 
and  fifth  almost  equal,  sixth  and  seventh  nearly  ecjiial,  shorter,  tenth  and 
eleventh  equal  in  length,  each  much  longer  than  the  ninth  ;  ocular  lines 
meeting  at  about  one  and  one-half  lengths  in  advance;  maxillary  palpi  j>ale 
tlavo-testaceous  throughout.  Prothorax  widest  at  the  middle,  where  it  is 
four-fifths  as  wide  as  the  head  and  slightly  narrower  than  long  ;  sides  from 
mid-section  gradually  convergent  and  siiiuatt!;  surface  ih.eply,  closely,  and 
rather  evenly  punctured  ;  a  narrow  and  deep  caiialiculation  begins  slightly 
behind  the  middle,  and  extends  posteriorly  a  di^anco  equal  to  about  one- 
fifth  the  length  ;  posterior  margin  nearly  straight.  Elytra  at  base  as  wide 
as  the  head,  sides  rather  strongly  divergent,  arcuate  ;  suture  about  one- fifth 
as  long  again  as  the  pronotum  ;  humeral  angles  rather  acute  ;  at  the  middle 
of  the  hase  of  each  there  is  a  marked  elevation  which  disappears  at  a  very 
short  distance  posteriorly;   just   behind   the  middle  and  situated  slightly 


20 


NORTH    AMKUrCAN 


lu'iiriT  tin;  fxtiTior  than  tin;  inturior  i-dgc,  tliori!  is  a  small  longitudiiially 
e'migntcd  spot  ot  Hiivo-testacfous  tint;  surface  di-nply,  clonely,  and  uvt-nly 
l>mi('tatt'.  Abdominal  scfjuicnts  docri'a.siii},'  very  j;i'adiially  in  wiiltli  j)<)><ti'- 
riiM'ly,  lirst  niiuh  nariowiT  than  tln"  continiioiis  elytra  ;  border  very  stiiMi};  ; 
MUrfaee  closely  punctate  ;' transverse  carinae  unicuspid,  cusj)  elongated. 
LfCgs  pale  flavo-testaceoiis  ;  t'eniora  clouded  with  fuscous  toward  ti]i,  tarsi 
hleiider,  each  joint  shaded  with  fuscous  at  til);  ''"''*'  j"'"t  of  j)v)sterior  eijual 
in  length  to  the  next  three  together.  Under  surface  piceous-black,  abdomen 
di-.tanfly  and  thu'ly  imnctulate,  shining. 

Miilf. — l-'ifth  ventral  segment  eniaiginato  in  tlie  nnddli>  third  at  apex, 
emarginatioii  evenly  roanded,  live  times  as  wide  as  deep,  terminated  by 
rather  well-developed  teeth  ;  surface  of  segment  impressed  for  a  short  dis- 
tance anteriorly  ;  sixth  segment  broadly  and  triangularly  incised  in  its 
middle  half  at  apex,  notch  four  times  as  broad  as  dei'p,  angle  slightly 
rounded  ;  seventh  broadly  emarginate  at  apex,  longitudinally  impressed 
dorsally. 

Fi'iiKiln. — T'nknown. 

Length  15.13  mm. 

Virginia,  1. 

Tliis  species  differs  from  semicolon,  Avliich  it  resembles  very  greatly 
ill  liU'ies,  in  the  structure  of"  the  jiiiteiiiial  club  ;  in  the  present  species 
the  tenth  joint  is  long  anil  eyiindricul,  ami  is  equal  in  length  to  the 
eleventh,  while  in  seuilrohm  the  tentii  joint  is  as  broad  as  long,  and 
much  shorter  than  the  eleventh.  It  also  differs  very  greatly  in  the 
maxillary  Jtalpi,  those  of  semicolon  being  very  dark,  especially  toward 
the  tips,  while  in  hilentl(j<itns  they  are  very  pale  (lavate  throughout. 
Tiu'se  two  ciiaracters  are  very  striking  and  very  singular  when  we 
consider  the  very  close  reseml)lanee  in  tlie  genenii  form  of  the  body. 
The  legs  in  semicolon  are  also  very  much  darker  ban  in  the  unicpie 
type  of  bileitti(j<itns. 

Division  B. 

In  this  division,  by  far  the  most  extensive  of  the  genus,  the  species 
enjoy  a  comparatively  great  range  of  variation,  not  only  in  size  but 
in  sculpture  and  structure  of  the  various  portions  of  the  body.  Tlie 
sculpture  varies  to  such  an  extent  from  one  form  to  another,  is  appa- 
rently so  constant  and  always  so  well  marked  and  easily  observed  in 
the  individual  species,  that  it  has  been  assumed  as  the  basis  of  primary 
subdivision  of  the  large  number  of  forms  here  considered.  The  sub- 
divisions are  indicated  by  the  following  scheme  : — 

Punctures  joined  into  more  or  less  tortuous  channels  in  at  least  one  portion 
of  tlui  elytra!  surface,  which  channels  exhibit  an  unmistakable  spiral  or 
vortex  arrangement,  the  spiral  or  vortex  being  complete  or  approximately 
closed  ;  single  punctures  more  or  less  isolated,  may  also  exist  at  other  parts 
of  t'.ie  elytra a. 


COLKOrTEUA. 


SI 


l'«iictiiri'«  jdint'd  or  i-onlf«coiit ;  pioni<>titn('«  rari'ly,  in  two?*  or  tlirt-i's.  in  otii'T 
oiist'H  in  loii<;fi'  cliiiniicls,  in  otlici'H  still  in  very  lon^;  clinnnds,  witli 
suarei'ly  it  trace  of  indiviiluni  ])un('tur«<s  iiiion  any  jxirtioii  of  llic  Hurfacc. 
The  channels  when  they  exist  may  he  extremely  tnrtnous,  hnt  unless 
they  exliihit  a  eoniiileteil  spiral  vortex  or  whirl  iit  one  jioiiit  at  least, 
they  will  helong  to  this  subdivision.  The  channels  or  imnctures  niny 
\w  comparatively  distant  or  very  closely  compacted,  and  llic  interspai-es 
correspond injjiy  wide  or  acute,  convex  or  flat,  highly  ixilishi-d  or  minutely 
granulose  and  feelily  shining. 

Prothorax  canal  icu  la  ted 3, 

I'rothorax  not  canal  icu  lated y.  f- ^  ^ 

I'uncturc-s  all  isolated  and  distinct i. 


Subdivision  «. 

Tlie  specit'S  tmdcr  this  title  attuin  the  highest  form  of  il(jvt'h)|)iiieiit 
to  he  ohserved  in  the  genus,  uiul  are  generally  large  and  rohust,  uetivc 
and  comparatively  powerful. 

The  forms  apparently  demanding  specific  recognition  may  he 
classified  as  follows  : — 

Transverse  carinae  of  abdomen  tricuspid. 
Le^is  hlack  heneath. 

Pronotum  having,  in  addition  to  the  canaliculation,  a  i>unctiforiu  im- 
pression near  each  antcM'ior  and  posterior  angle. 

Prothorax  widest  sliglitly  heliind  the  middle S.   SCIllptilis. 

Prothorax  widest  far  in  advance  of  the  luiddle !>.  lilCCUlillillli^« 

Prothorax  devoid  of  the  punctiforni  inxpressions. 
Elytral  suture  much  longer  than  the  pronotum. 

Interocular  surface  rather  deeply  excavated  ;  longitmlinal  elevation 
distinct;  canaliculation  of  pronotum  distinct. 

Head  as  wide  as  the  elvtra  at  base 10.  jiino* 

Head  much  narrower  than  the  elytra 11.  verticOHlls. 

Interocular  surface  feebly  excavated  ;    longitudinal  elevation   very 
feeble;   canaliculation  of  the  pronotum  reduced  to  a  very  sliirht 

«'rosio  I  12.  tristis. 

Elytral  suture  rather  "horter  than  tlu^  pronotum  ;    body  de](ressed  ; 

prothorax  very  robust 1:5.  Alistini. 

Legs  not  hlack  beneath. 

Form  very  slender ;  sculi>ture  extremely  coarse ;  interocular  surface  very 
narrow,  much  less  than  twice  as  wide  as  the  eye  ;  length  4.4  mm. 

14.  raiiops. 
Form  more  rohust ;  interocular  surface  at  least  twice  as  wide  as  the  eye  ; 
length  generally  much  less  than  4  mm. 
Elytral  suture  about  as  long  as  the  pronotum. 

Sides  of  prothorax  scarcely  sinuate   behind  ;   siirfaco  of  pronotum 
very  distantly  and  finely  punctate,  very  highly  polished.    Middle 

•''tates 15.  ilelawarensis. 


22 


NORTir    AMKUICAX 


Siili'H  of  jirotlKirnx  Ntroiijjly  siniiattt  lifhiiid  ;    smTaci'  of  iiroiKitiiin 
riitlior  (Iniist'ly  and  t'o(irs«'ly  Mculiiturccl.     WawliiiiKtoii  'I'l'iiitury. 

li).  sectutor. 

Klvti'.'tl  siitiii'i!  tniich  longi>r  than  the  iironotiini. 

I'icitliorax  widest   in  advani't;  of  tiic  middle;    licad  small,' sii>,'iitly 

narrower  than  the  ulytra  at  base 17.  ZllliicilH. 

I'rotliorax  widest  at  or   behind   the  miildle;   liend   lar;,'e,  as  wiile  as 

or  slii,'btly  wilier  than  the  elytra  at  base 18.  feniorutllH. 

TransverHe  cnrinae  of  iibdonjon  riidimentarily  4-uuspid.     Washin^jton  Terri- 
tory   111.  tacoiiise. 


8.  S.  H(;ill|itilis  n.  sp. — Form  robust.  I'liht  tcence  very  fine,  sparse, 
plumbeous,  ami  almost  invisible,  except  on  the  abdomen,  where  it  is  short, 
coarser,  close,  evenly  distribnjed,  sub-rei  iimbent,  and  fulvous  in  color.  Head 
moderate,  more  than  twic«  as  \?id«  as  lonp  ;  interocnlar  surface  moderately 
depressed,  nearly  three  times  as  wide  as  the  eye  ;  lonj^itiidinjil  tdevjition  as 
wide  as  the  lateral  portions,  abruptly  rising;,  evenly  and  vety  stroiifjly  con- 
vex ;  pnn<;tnri'S  in  this  region  evenly  distributed,  not  .oalescent,  round,  and 
Very  close,  near  the  eyes  the  punct\ircs  are  confusedly  cualesceiit ;  (jcular 
lines  meetinj;  at  about  two  lengths  in  advance;  anteniiau  long,  distinctly 
longer  than  tlii'  width  of  head,  very  slender,  <dub  prominent  an<l  loose, 
thi'oughout  ]>ale  iiiccous-brown  ;  third  joint  one-half  longer  than  the  fo'ivth, 
fourth  and  fifth  equal,  sixth  very  slightly  longer  and  somewhat  less  robust 
than  the  seventh,  i^iglitli  twti-thirds  as  long  as  the  seventh,  more  than  twice 
as  long  as  w  ide,  rather  abruptly  larger  toward  tip,  joints  of  club  of  eijual 
length,  slightly  longer  than  the  eighth  ;  maxillary  palpi  long,  baHal  joint 
and  basa'.  half  of  the  second  rather  pah*  piceo-testaceous,  remainder  pale 
piceous-brow  n,  third  joint  vvvy  long,  strongly  lljittened  ;  nientnm  having 
four  stout  yellow  setae  arranged  transversely  near  the  bas,-.  Prothorax 
widest  in  the  middle,  whiM'e  it  is  live  sixths  as  wide  as  the  luad,  and  just 
jierceptibly  narrower  than  long  ;  sides  thiMice  strongly  uonvergci.t  posteriorly 
and  rather  strongly  sinuate  ;  anterior  and  posterior  margins  eijual  in  length, 
the  former  slightly  the  more  arcuate  ;  surface  with  two  strongly  impressed 
pita  at  the  base,  and  two  at  the  vertex,  strongly  tuberculate  near  the  basal 
angles,  transversely  and  strongly  impressed  just  behind  the  vertex,  extremely 
closely,  deeply,  and  very  confusedly  punctured  and  chanuided,  interspaces 
very  acute  ;  canaliculatiou  very  strong,  deeply  impressed,  fusiform,  two-thirds 
as  long  as  the  pronotum,  terminating  slightly  niuirer  the  apex  than  the  base, 
bottom  sjjaringly  punctate,  edges  narrowly  and  acutely  swollen.  Elytra  at 
base  as  broad,  or  very  slightly  broader  than  the  head  ;  sides  feebly  diver- 
gent, slightly  longer  than  the  width  at  base,  rather  fet.'bly  arcuate;  togi!ther 
bioadly,  angularly,  and  deeply  emarginate  behind  ;  suture  nearly  onedialf 
longer  than  the  pronotum  ;  surface  broadly  impressed  on  the  suture  at  the 
base,  rather  finely,  extrtnnely  closely,  and  irregularly  channided,  ch<innels 
long,  deep,  and  very  tortuous,  interspaces  acute.  Abdominal  segments 
decreasing  uniformly  and  rapidly  in  width,  first  much  narrower  than  the 
contiguous  elytra  ;  surface  rather  convex,  extremely  finely  and  irregularly 
punctulate ;  transverse  cariuae  tricuspid,  cusps  broader  than  long,  intervals 


OOKKOPTKIIA. 


28 


(lfi>|)  and  trinngiilar.    Legs  mndcrittf  in  Icii^'tli,  rather  rolinst,  picon-fuMcoiis  ; 

lli'Mt  joint  (if  posti'iior  tiirsi  iint'-li.'ilf  lon^jcr  tlian  tlic  Mcconcl,  as  long  as  tlii« 
tittii,  stM'oUil  joint  iiitlicr  .slmrtcr  tiian  tiic  ni'Xi  two  foj^i'tin'r. 

,l/,(/,.. — Fifth  ventral  Hcgnicnt  oiaarginatc  in  its  niidille  third  at  apox, 
etna !';.'{ nation  cvi-nly  roimdi'd,  and  ten  tiwii-s  as  wide  as  di'f)),  (■onti<;nons 
siirfaci'  dci'|dy  inipn-.sniMl,  inijiri'ssion  in  tin-  form  of  an  oval,  distinctly  lonjjer 
tlian  wide,  tlie  sides  liein^'  Very  deulivons  on  all  sides  exeejtt  posteriorly, 
where  till)  eniar},'ination  forms  its  outlet,  the  sides  lieeome  acutely  rid);i'd 
posteriorly,  and  terminatu  at  the  ends  of  the  emarKination  in  aeute  teeth, 
]irojeetin^  Hli^htly  In  liincl  the  se^^ment,  tl  hottom  of  the  oval,  erater-liki' 
impression  is  llat,  minntely  retiii;lated  ancl  palieseent  ;  sixth  segment  sinuate 
at  apex,  sinus  nanower  than  the  apiees,  hroadly  rounded  at  tin*  hottoui, 
rather  abruptly  terminated  lieliind,  and  ahout  one-half  wider  than  deep; 
Seventh  segment  roundly,  ratln'r  deeply  and  evenly  emarginate  at  tip. 

Ffiiitih;, — ITnknown. 

Length  4.S-.'j.0  nun. 

Liike  Tahoi',  Ncviulii,  1  ;  Ciilitorniii,  1  ;  Teiiino,  Washin;j;t()ii  'IVr- 
ritory,  1. 

One  ot'  tlif  finest  species  of  the  genns,  and  surpussetl  by  none  in 
the  siiiguhirity  and  distinctness  of  its  sexual  eiuiraeters.  Tiie  pro- 
tliorax,  also,  has  more  strikiii^j  and  salient  characters  than  perhaps 
any  other  species;  the  stron>i  Itattening  of  the  third  palpnlar  joint  is 
u  cliaractei'  seldom  seen  in  lliis  trihe. 


!•.  S.  laC'COpllilllS  n.  sp. — Form  robust.  ruheseence  short,  eoarse, 
evenly  distrihuted,  semi-erect  and  pale  llavati-  on  the  ahdonien,  (cinereous, 
and  muih  less  eonspiciuius  on  the  remainder  of  the  upper  surfa<'e.  Head 
moderate,  twice  as  widt^  as  long  ;  intercwular  surface  very  feebly  (^l^vex,  two 
and  three-fourths  times  as  wide  as  the  eye  ;  longitudinal  elevation  narrower 
than  the  lati^ral  jiortious,  very  strongly  and  evi'uly  convex,  ])romimuit,  sulfa- 
tions prominent;  piiui-tures  rather  large,  <^venly  distributt^l,  deep,  rounde<l, 
seldom  coalescent,  interspaces  feebly  shining;  ocular  lines  meeting  at  one 
and  one-half  lengths  in  advancis  antennae  scarcely  longer  than  tin?  width 
of  liead,  rather  I'obust,  jiieeous-black,  club  distinct  and  densely  pubescent; 
third  joint  two-lifths  longer  than  the  fourth,  fourth  and  lifth  joints  e(iual, 
sixth  and  seventh  equal  in  length,  the  latter  much  thicker  and  narrow  at 
the  base,  eighth  slightly  longer  than  broad,  very  robust,  joints  of  club 
slightly  incri'asing  in  length,  very  robust;  the  live  outer  joints  are  sii<ld<'uly 
nuudi  more  thickly  pubescent  than  the  preceding  ;  nuixillary  jialpi  moderate 
in  length,  first  joint  flavate,  second  dark  piceous-brown,  third  black,  first 
two  joints  unusually  robust,  third  unusually  thin  and  shoi't.  Prothorax 
widest  at  the  middle,  where  it  is  very  slightly  narrower  than  the  head,  ami 
just  perceptibly  narrower  than  long  ;  sides  thence  very  moderately  conver- 
gent posteriorly  and  very  feebly  sinuate  ;  anterior  and  jiosterior  margins 
eijual  in  length,  the  foruu-r  arcuate,  the  latter  nearly  straight  ;  surface  dis- 
tinctly and  longitudinally  tuberculate  near  the  basal  angles,  longitudinally 
impressed  along  the  Hanks  of  the  pronotuui,  transversely  impressed  behind 


24 


NORTH 


^KUICAN 


tlii.>  iipt'X,  liaviiif;  two  small,  found,  shallow  i)its  very  closo  to  tint  api'x  and 
soiiicwliat  nt'ai-  the  ajiical  anj^li's  ;  i)mictnrcs  very  dwp,  (^xtrcincly  dose  near 
till'  liasc  and  apex  ;  canaliciiiation  long,  narrow,  distinctly  and  roundly 
inipri'sscd,  tciiniMatii  j;  at  very  short  distances  from  tlm  base  and  apex. 
Elytra  at  liasc  much  hroadcr  than  tho  head  ;  sides  fv'ebly  divergent  jioste- 
riorly.  rath(;r  strongly  and  evenly  arcuatt? ;  together  broadly,  roundly,  and 
distincMy  emarginate  hehind  ;  suture  as  long  as  the  width  at  base,  one-tliird 
longer  than  the  pronotum  ;  surface  deeply,  rather  (iiieiy,  extremely  dosidy, 
an<l  unevenly  channeled,  very  confusedly  i)unctate  near  the  base.  Abdo- 
minal segnuMits  del  reasing  nnifoiinly  and  extremely  gradually  in  width,  first 
as  wide  as  the  contiguous  elytra;  surface  coarsely,  rather  'dosely  and  (;venly 
punctulate,  more  finely  and  distantly  so  posteriorly,  interspaces  polished  ; 
transvei'se  carinae  tricus])id,  middle  cusps  strong,  acicular  toward  tijis, 
lateral  much  broader,  somewhat  shorter,  expanding  at  tips  ;  lateral  bonleis 
very  strong.  Legs  rather  long  auil  slender,  piceous-blaek,  tarsi  rather 
robust;  lirst  joint  of  jiosterior  tarsi  three-fourths  longer  than  the  secoml,  as 
long  as  the  next  two  together,  and  slightly  shorter  than  the  fifth. 

Male, — I'nknown. 

FiiiKilc. — Sixth  ventral  segnnmt  l>roadly  and  rather  obtusely  rounded 
behind. 

Length  4.0  mm. 

Grimsby,  Ontario,  1. 


10.  S.  jlllio  (l'\ab.). — Form  rcdmst.  I'ubescence  short,  sparse,  eviuily 
distributed,  semi-erect,  fine,  and  incons])icuous,  cinereous.  Head  robust, 
scarcely  twice  as  wide  as  long;  interocular  surface  moderately  depressed, 
nearly  twice  as  wide  as  th(!  eye,  ecjually  trilobed  by  the  very  distinct  longi- 
tudinal snlcations,  intermediate  surface  evenly  and  rather  strongly  convex  ; 
punctui'es  coarse,  very  close,  unequal  in  size,  mostly  coalescent,  and  generally 
longitudinally  elongated;  ocular  lines  meeting  at  slightly  more  than  one 
lengtli  in  advance  ;  antennae  much  longer  than  the  width  of  head,  slemler, 
])iceous-br,)wn,  basal  joints  black,  club  moderate  ;  third  joint  about  one-half 
longer  than  'he  fourth,  fourth  slightly  longer  than  the  fifth,  sixth  and 
seventh  equal  in  length,  the  latter  slightly  thicker,  eighth  as  thick  as  the 
seventh,  twice  as  long  as  wid(%  ovoidal,  very  narrow  /it  base,  joints  of  club 
increasing  gradually  in  length  and  thickness  ;  nuixillary  palpi  very  long  and 
slender,  first  and  second  joints  llavo-testac(;ous,  third  rather  pale  piceous- 
brown,  vovy  slender.  Prothorax  widest  at  the  middle,  where  it  is  live-sixths 
as  wide  as  the  head,  and  ve'y  slightly  narrower  than  long;  sides  thence 
niod(!rately  convergent  postei  lorly  and  neai'ly  straight ;  surface  feebly  swollen 
near  tlie  basal  angles,  transv(-rsely  and  feebly  impressed  just  behind  the 
vertex,  rather  coarsely,  closely,  and  evenly  jmnctaie,  punctures  coalescent 
toward  the  base  and  apex  ;  canaliculation  very  feeble,  two-thirds  as  long  as 
the  pronotum,  terminating  at  equal  distances  from  tlie  base  and  apex. 
Elytra  at  base  just  jx^rceptibly  narrower  tlian  the  head  ;  sides  moderately 
divergent  posteriorly,  slightly  longer  than  the  width  at  base,  nearly  straight 
anteriorly,  arcuate  near  the  apices  ;  togcsther  broadly,  roundly,  and  rather 
strongly  emarginate  behind  ;  suture  one-seventh  longer  than  the  pronotum; 


COLEOPTEUA. 


25 


surface  vory  feebly  dopressod  on  tlit;  snturt!  at  tlie  base,  (^oarfcly,  il('(']ily, 
("Xtri'iut'ly  (.'loscly  imnctiirt'il  ami  thaiini'Iccl.  First  foiii'  abdiniiiiial  si'j;iiieut3 
equal  in  widtii  and  imuli  narrower  tliaii  tlie  ('(intignoiis  I'lytra ;  surface 
coarsely,  deeply,  and  moderately  sparsely  punetulate ;  trausvorso  carinae 
tricuspid,  middle  cusps  lou<;  and  aeit;ular,  lateral  short  and  iiieouspieiU)US. 
Legs  bhuk  above,  tibiae  and  tarsi  ])ieeous  IxMieatli,  slender,  posterior  feiuora 
conspicuously  and  very  densely  clothed  with  long  tlavo-oinereous  ])ubesc»3nce 
along  the  ])osti'rior  e(lge  ,  first  joint  of  ])osterior  tarsi  much  more  than  twice 
as  long  as  the  second,  longer  than  the  next  tliree  together,  and  three-lourths 
longer  than  the  iifth,  joints  vtM'y  shnider. 

Mtili'. — First  ventral  segniiMit  having  a  short,  narrow,  longitudinal,  and 
piominent  carina,  tersniiiating  at  its  posterior  edge  ;  second  segment  having 
a  siu'.ilar  carina,  which  does  not  attain  the  post(M'ior  tMlge  ;  third  segment 
emarginate  in  its  middle  tw(dfth  at  apex,  einargination  evenly  rounded  and 
\(}iy  feeble,  surface  having  a  carina  similar  to  that  of  the  first  segment,  which 
neaily  attains  the  eniargination  ;  fourth  segment  emarginate  in  its  middle 
lil'th  at  apex,  emarginalion  more  acutely  rounded  at  the  bottom,  about  eight 
times  as  wide  as  deep,  conti  'ous  surface  feebly  impressed  for  two-thirds  the 
length  anteriorly,  carina  siuiilar  to  that  of  tin'  lirst  segment,  though  slightly 
longer,  nearly  attaining  the  emargination  ;  Iifth  segment  very  deeply  ex- 
cavated in  its  middle  two-fifths,  bottom  of  excavation  not  punctate,  nearly 
Hat,  and  declivous  posteriorly,  as  long  as  wide,  sides  in  the  foi  m  of  over- 
hanging, very  acute  ridges  ;  anterioily  there  is  a  carina  similar  ui  that  of 
the  first  segment,  posteriorly  the  tliin  edge  of  the  excavation  is  dceiily  emar- 
ginate ill  its  middle  half,  emargination  one-half  deeper  than  wide,  transverse 
at  bottom.  si<les  nearly  j.arallel  ;  sixth  segment  sinuate  at  apex,  sinus  very 
narrow  and  deep,  acutely  rounded  at  tbn  iKittom,  much  deeper  than  wide, 
apices  acutely  rounded  ;  seventh  segment  dentate  laterally  beliind,  and 
bearing  on  each  side  a  long  coarse  seta. 

FiiikiIp. — Sixth  segment  strongly  narrowed  posteriorly,  bilobed  at  apex. 

Length  4J>  mm. 

Ciiiiiliridgi',  Mass.,  S;  Micliigan,  12;  Texas,  1 ;  Canada,  0;  Wasli- 
iugtoii  Territory,  7  ;   Vancouver  Islaiul,  1. 

In  tlie  female  tlie  abdominal  sejiments  are  nnicli  broader  and  have 
tlie  sides  feebly  converpfent  po-^teriorly.  There  are  few  s|»e('ies  of  the 
order  Coleoptera  bavinii;  sexual  cbaracters  sodisiiiu-t  and  coniiilicated 
as  those  seen  in  thi:-  little  species;  a  clear  description  of  the  (ifth 
segment  of  the  male  would  l)e  almost  impossible.  It  is,  perhaps, 
cosmopolitan,  being  a  very  conunon  species  in  Europe  as  well  as  in 
America. 


11.  S.  vei'ticosUS  n.  sp. — Form  robust.  Pubescence  very  line,  sparse, 
irregular,  cinensous,  and  almost  invisible.  Head  sn\all,  twice  as  wide  as 
long;  interocular  surface  nearly  fiat,  more  than  twici'  as  wide  as  tlie  eye; 
longitudinal  elevation  slightly  narrower  than  the  lateral  portions,  very 
strongly  and  evenly  convex,  prominent,  sulcations    parallel   ami  distinct, 


26 


NOHTir    AMERICAN 


behind  the  antennae  there  are  pits  bonUfring  immediately  upon  the  eye; 
punetures  fine,  rounded,  very  unevenly  distributed,  interspaiu'S  sliining, 
feebly  convex  ;  ocular  lines  nmetiiiy  at  one  length  in  advance  ;  antennae 
longer  than  width  of  head,  slender,  piceons-black,  club  strong,  clothed  with 
pale  piceo-ciiKjreous  pubescence  ;  third  joint  one-halt'  longer  tlian  the  fourth, 
fourth  and  fifth  e<iual,  sixtii  and  seventh  e(iual  in  length,  the  latter  two- 
thirds  tliicker,  eighth  tliicker  than  the  seventh,  almost  exactly  glolnilar, 
joints  of  club  increasing  in  ](Migtli,  last  two  much  larger  than  the  ninth, 
sub-eqnal  in  tliickness  ;  maxillary  pn,\[n  rather  long,  first  joint  and  base  of 
secoml  piccd-testaccous,  second  twice  as  long  as  the  first,  i)iceoes-black,  third 
rather  long,  piceous-black,  rather  abruptly  enlarged  towaid  the  tip,  and 
somewhat  sigmoid.  Prothorax  robust,  widest  sligiitly  in  advance  of  the 
miildle,  where  it  is  nearly  as  wide  as  the  liead  and  ilistinctly  narrower  than 
long;  sides  thence  very  feidily  converg(!nt  posteriorly  and  straight;  anterior 
and  posterior  margins  very  feebly  and  equally  arcuate,  sub-e(iual  in  length  ; 
ftliical  and  basal  angles  not  rounded  ;  surfaces  feebly  and  liroadly  tubcrculate 
near  the  basal  an;rles,  transversely  im|)resse(i  behind  the  vertex,  rather 
finely,  somewhat  deeply,  very  closely,  and  confusedly  channeled:  canalicu- 
lation  V(iy  narrow  and  distinct,  terniinating  within  one-lifth  the  pronotal 
length  of  the  base  and  apex.  Elytra  at  bast?  much  wider  tliaii  the  head; 
sides  feebly  divergent  posteriorly,  nearly  straight  toward  the  humeri,  dis- 
tinctly arcuate  toward  the  vertices  ;  togethtu'  very  broadly,  roundly,  and 
rather  feebly  emarginate  behind;  suture  slightly  longer  than  the  width  at 
base,  one-third  longer  than  the  pronotum;  surface  very  deeply,  extremely 
closely,  rather  coarsely,  and  very  irregularly  channeled ;  there  are  tvfo 
completed  vortices  at  the  base,  and  one  near  the  apex  of  each  elytron. 
Abdominal  segments  decreasing  uniformly  and  extremely  gradually  in 
widtli,  first  very  slightly  narrower  than  the  contiguous  elyti-a  ;  surface  very 
feeblj  convex,  finely,  rather  distantly  and  evenly  punctulate,  shining ; 
border  very  strong;  transverse  carinae  tricuspid,  middle  cusps  finely  acumi- 
nate, lateral  very  short  and  rudimentary.  Legs  rather  short,  slender, 
black;  fii'st  joint  of  posterior  tarsi  two-thirds  longer  than  the  second,  much 
shorter  than  the  fifth,  second  very  slightly  longer  than  the  third ;  all 
robust. 

Mule. — Fourth  and  fifth  ventral  segments  emarginate  in  the  middle  two- 
fifths  at  apex,  emargination  of  the  former  rounded  and  very  feeble,  that  of 
the  latter  evenly  rounded,  strong,  about  four  timi'S  as  wide  as  ileep,  con- 
tiguous surface  of  fourth  iiiiiiressed  feebly  for  a  short  distance,  that  of  fifth 
strongly  impressed  nearly  throughout,  impression  having  the  lateral  bonb^rs 
in  the  form  of  acute  ridges,  all  dep.'essed  areas  being  bordered  by  a  very 
dense  line  of  erect,  coarse,  fiavate  S(!tae  ;  sixth  segini^nt  sinuate  at  tip,  sinus 
narrower  and  more  acutely  rounde(l  than  tiie  apices,  more  than  one-half 
wi(b>i'  than  dt^ep  ;  seventh  segment  roumlly  eniHrginate  at  tip. 

Fciiifilf. — ISixth  venti'al  segnnuit  rather  acutely  rounded  behind,  surface 
finely  reticulated  and  minutely  punctulate. 

Length  4.0  mm. 

Vancouver  Island  (Crotch),  1 ;  Washington  Territory,  0. 


COLKOPTKKA. 


27 


tli(!  eye ; 
sliiniuj^, 
antciiiiiU! 
tlieil  witli 
lie  fouitli, 
ittcr  two- 
f,'l()l)iilar, 
tlio  ninth, 
nil  base  of 
ivck,  tliinl 
J  tip,  and 
ice  of   the 
•owi'i-  than 
,  ;  anterior 
in  liMiiitli ; 
ubtiiciilate 
I'X,   ratlier 
;  canalicu- 
le  pi-fHiotal 
th<i  hcail ; 
unu'ii,  ilis- 
iindly,  and 
It.  wiiltli  at 
,  extremely 
re   are   two 
ch  elytron, 
radnally    in 
lufaue  very 
e,  shining  ; 
ucly  acnnii- 
rt,   slender, 
•ond,  nuu'h 
tliird  ;    all 

middle  two- 
ilile,  that  of 

deep,  eon- 
tiiat  of  lifth 
eral  borders 

by  a  very 
at  tip.  sinus 
lan  onedialf 

lind,  surface 


In  this  species  the  vortex  arrangement  of  the  elytral  sculpture  may 
be  seen  in  a  higiily  developed  state.  In  none  other  of  our  sjjecie.s  is 
it  so  conspicuous. 

12.  S,  tristis  n.  sp. — Form  moderately  robust.  Pubescence  short,  mode- 
rately close,  evenly  distril)Uted,  senii-ere(;t,  ratlier  fine,  plumbo-ciiu'reous. 
Head  moderate,  rather  robust,  twict;  as  wide  as  lonj; :  interocular  surface 
]ii\uly  flat,  t\vic(!  as  wide  iv.-  the  eye,  loni,'itndinal  elevation  as  wide  as  the 
lateral  ]iortions,  feebly  and  evenly  cunve.v  ;  punctures  snuill,  round,  rather 
close,  sub-variolate,  evenly  distributed,  isolated  ;  ocular  lines  meeting  at  one 
lenj;th  in  advaiu^e  ;  antennae  vi'vy  dark  piceous  brown  or  piceous-black  ; 
third  joint  distinctly  longer  than  the  second.  Prothorax  robust,  widest  at 
slightly  more  than  one-third  of  its  length  posteriorly,  where  it  is  nearly  as 
wide  as  the  head,  and  just  perceptibly  narrower  than  long;  sides  rather 
strongly  convergent  posteriorly  and  nearly  straight ;  antt^rior  margin  slightly 
longer  than  the  posterior,  nearly  e<iually  arcuate  ;  surface  feebly  tulieiculate 
near  the  basal  angles,  very  feebly  so  near  the  apical  angles,  upper  surface 
of  pronotum  nearly  Jlat ;  punctures  small,  very  variable  in  shape  and  size, 
close,  rather  eV(MiIy  distributed,  seldom  coalescent,  interspaces  narrow, 
slightly  convex  and  feebly  polishiMl ;  caualiculation  very  short,  nearly  as 
broad  as  long,  beginning  at  the  middle,  and  one-liftl.  as  long  as  the  pro- 
otum,  very  feebly  impressed,  bottom  punctate.  Elytra  at  bas(!  ,'is  wide  or 
just  percepti\)ly  wilier  than  the  head;  sides  rather  feebly  divergent  j)0Ste- 
riorly,  longer  than  the  width  at  base,  very  fetdjly  and  evenly  arcuate ; 
together  broadly  and  very  feebly  emarginate  behind  ;  suture  one-tliird 
longer  than  the  pronotum  ;  surface  very  feebly  impressed  along  the  suture, 
more  particularly  toward  the  base,  feebly  convex,  closely,  somewhat  feebly, 
finely,  and  irregularly  punctate,  punctures  generally  variable  in  shape  and 
size,  seldom  actually  coalescent  near  the  base,  where  they  are  closely  crowded, 
polygonal  in  some  places,  isolated  and  round  in  others,  more  coalescent  ])oste- 
riiirly;  spiral  near  the  apex  and  outer  edge,  very  indeiinite  and  feeble. 
Abdominal  segments  decreasing  nearly  uniformly  and  extremely  gradually 
in  width,  fust  just  perceptibly  narrower  than  the  elytra;  surface  coarsely, 
deeply,  evenly,  and  closely  punctulate  ;  punctures  impressed,  interspaces 
very  convex  and  highly  polii^hed  ;  transverse  carinae  tricuspid,  middle  cusps 
finely  acicular,  lateral  rather  coarsely  acuminate,  a  little  shorter  and  strongly 
inclined  inward.  Legs  moderate  in  length,  slender,  piceous-black  ;  first 
joint  of  posterior  tarsi  two-thirds  longer  than  the  second,  slightly  shorter 
than  the  last,  and  slightly  longer  than  the  next  two  together. 

Mull', — Posterior  edge  of  the  lifth  ventral  segment  just  perceptibly  emargi- 
nate in  its  middle  third,  emargination  evenly  rounded  and  not  jueasurable, 
contiguous  surface  bearing  slight  ei  lences  of  fiattening ;  sixth  segment 
sinuate  at  apex,  sinus  narrower  than  the  apices,  and  more  acutely  rounded, 
slightly  more  than  twice  as  wide  as  deep;  seventh  segment  very  feebly  and 
roundly  emarginate  at  tip. 

Female, — Ihi  known. 

Length  3.o  mm. 


28 


NORTH    AMERICAN 


Gilroy,  Californin,  1. 

Tlie  iintciinac  witli  exception  of  the  first  three  joints,  and  also  tlie 
niaxiihiry  palpi  are  wanting  in  the  type. 

13.  S.  Alliitiiii  II.  sp.  rF.i\iv('l  MS.). — Form  moderately  sUmicLm-,  siili-s 
jiaralli'l.  rulit'scfiico  fiiie,  cvi-iily  distributi'il,  moderately  short,  I'atlier 
f^parse  and  iiu-oiisj)iciii)iis,  cinereous.  Head  lar^e,  not  twicer  as  wide  as 
long;  interooular  surfact*  very  feebly  depressed,  scarcely  twice  as  wide  as 
the  ey(%  lonpjitudinal  elevation  nineli  narrower  than  thi^  latei'al  jjortioiis, 
rather  acutely  and  strongly  convex,  prominent  ;  i)nnctures  fuii',  roundeil,  very 
closely  crowded,  evenly  distributed,  not  coale.icent ;  ocular  lines  mo(!ting  at 
one  length  in  advance;  eyes  v(!ry  large,  wide,  and  prominent;  antennae 
very  slightly  longer  than  the  width  of  head,  raiher  slender,  dark  piceons, 
club  j)roiniiient ;  third  joint  one-fourth  longer  than  tht^  fourth,  fourth  per- 
ceptibly longer  than  tlu^  fiftli,  sixth  shorter,  very  slightly  longer  than  the 
seventh,  eighth  slightly  elongated,  joints  of  club  increasing  in  length,  last 
two  more  robust  than  the  ninth  ;  maxill.ary  i)ali)i  slender,  lirst  two  joints 
pale  piceo-testaceous,  third  pale  piceous-brown.  Prothorax  rolmst,  arciiately, 
evenly,  and  rapidly  increasing  in  width  to  the  middle,  where  it  is  slightly 
narrower  than  long  ;  sides  thence  rather  rapidly  convergent  ]iosteriorly  and 
nearly  straight  ;  anterior  margin  slightly  longer  and  just  visibly  more  arcu- 
ate than  tlie  posterior  ;  surface  strongly  tuberculate  near  the  basal  angles, 
broadly  and  feebly  swollen  behind  the  apical  angles,  transversely  impressed 
behind  the  ap(!X,  finely,  extremely  closely,  and  soiiufwhat  evenly,  though  at 
some  points  rather  confusedly  punctured  ;  canaliculation  prominent,  im- 
pressed, narrow,  begiiniing  at  one-third  the  length  from  tlu;  apex  and  nearly 
one-half  as  long  as  the  jironotum.  Elytra  at  base  vt^ry  nnicli  narrower  than 
the  lieaii  ;  sides  moderately  divergent  posteriorly,  longer  than  the  widtli  at 
base,  nearly  straight  ;  together  broadly,  roundly,  and  distinctly  emarginate 
behind  ;  suture  somewhat  shorter  than  the  pronotum ;  surface  depressed, 
nearly  even,  coarsely,  closely,  and  irregularly  pur.ctate,  scarcely  channeled, 
but  the  punctures  at  a  spot  behind  the  middle  seem  to  indicate  an  obscure 
vortex  whirl,  in  most  specimens  it  is  (piite  distinct  under  suitable  magnify- 
ing power.  First  four  abdominal  segments  very  slightly  wider  than  the 
contiguous  elytra;  sicb'S  parallel  and  very  feebly  arcuate;  border  very 
strong,  suddenly  much  narrower  on  the  fifth  segment  ;  surface  feebly  con- 
vex, rather  strongly,  closely,  and  evenly  punctulate,  interspaces  iiolished  ; 
transvers(i  carina(!  tricuspid,  mi<ldle  cusps  broad  and  coarsely  acuminate, 
lateral  excessively  short  and  rudimentary.  Legs  rather  long  and  slender, 
dark  fuscous  ;  first  joint  of  posterior  tarsi  much  more  than  twice  as  long  as 
the  second,  nnuh  longer  than  the  next  three  together,  and  three-fourths 
longer  than  the  last. 

Male, — Fourth  ventral  segment  very  feebly  and  just  perceptibly  emargi- 
nate ill  the  middle  fourth,  with  the  contiguous  surface  very  feebly  inipri'ssed  ; 
fifth  segment  strongly  emarginate  in  its  middh?  fourth  at  apex,  emaigination 
evenly  rounded,  six  times  as  wide  as  deep,  contiguous  surface;  cylindrically 
impressed  throughout  anteriorly ;  sixth  segment  strongly  sinuate  at  apex, 
Binus   about  equal   in   width   ami  curvature   to  the   apices,   rather   acutely 


COLEOPTERA. 


29 


louiiilcd  at    till)  Twttom,   about  twice  as  wide  as  deep  ;    soventh   segment 
Lroadly  and  IVubly  emarginate  at  tip. 

FitiKili', — Sixtli  ventral  segment  rather  acutely  rounded  behind. 

Len^'th  ;?.4-)>.8  nun.  (in  an  exeei)ti()niil  ease  3.2  mm.). 

New  IlaniiKsliirc  (White  Mts.),4  ;  Luke  Superior  (Marquette,  Miohi- 
picoten  River,  Giirgantuu,  Isle  Hoyale),  (iO  ;  Biitisii  Colimibia,  1. 

From  the  above  list  of  localities  this  s|)(!cies  is  shown  to  have  a 
very  e.xtensive  range;  it  is  also  very  aliundant.  Although  very  dis- 
tinct in  f'acies,  the  vortex  spot  is  so  indistinct  that  isolated  specimens 
may  not  be  placed  at  first  in  the  sidxlivision  to  which  it  is  here 
ri'lernid.  The  several  characters  ajipear  to  vary  very  slightly  in 
degree,  more  particularly  in  th(.'  degree  of  cylindrical  impression  of 
the  fifth  segment.  The  specimen  from  British  Columbia  has  the 
punctuation  of  the  pronotum  a  little  less  dense,  and  that  of  the  elytra 
a  little  liner  and  deeper,  but  otherwise  it  exactly  resembles  the  Eastern 
representatives. 


14.  S.  I'aiiops  11.  sp. — Form  very  slender.  Pubescence  excessively  fine, 
short,  and  sparse,  nearly  invisible.  Head  very  robust,  much  less  than  twice 
as  wide  as  long  ;  interocular  surface  not  twice  as  wide  as  the  eye,  distinctly 
di'prcsseil,  lon;;;itudinal  elevation  very  narrow,  fusiform,  short,  strongly  and 
evenly  convex,  impunctate  and  somewhat  prominent  ;  punctures  very  close, 
rather  fine,  confusedly  coalescent ;  ocular  lines  meeting  at  slightly  more  tlian 
one  length  in  advance  ;  antennai;  much  longer  than  the  width  of  head, 
slender,  piceous-brown  throughout,  club  moderate;  third  joint  very  long 
and  slender,  feebly  curvTite,  slightly  more  than  one-half  longer  than  the 
fiiurth,  foui-th  and  fifth  joints  equal,  sixth  very  slightly  shorter  and  dis- 
tinctly more  slender  than  th(^  si'veiith,  abruptly  much  shorter  than  tlie  fifth, 
eighth  three-fourths  longer  than  wide,  as  thick  as  tlie  seventh,  oval,  joints 
of  dull  inoeasing  uniformly  and  rapidly  in  length,  uniformly  and  very 
gradually  in  width  ;  Joints  three,  four,  and  five  together  are  as  long  as  the 
lemaining  six  together;  maxillary  palpi  very  long  and  slender,  very  pale 
finvat't  throughout;  mentum  bearing  two  flavate  setae  near  the  base.  Pro- 
thorax  widest  at  the  middle,  where  it  is  three-fourths  as  wide  as  the  head, 
and  nearly  one-fifth  narrower  than  long  ;  sides  thence  nearly  straight  ante- 
riorly, nearly  eijually  converg(!nt  and  very  feebly  sinuate  posteriorly  ;  anterior 
margin  shorter  and  much  more  arcuate  than  the  posterior;  surface  rather 
coarsely  and  extremely  irregularly  sculptured  ;  canaliculation  obscun '.y  de- 
fined, just  behind  the  middlt-  it  is  visible  as  a  very  distinct  but  indefinitely 
outlined  impression.  Elytra  at  base  narrower  than  the  head  ;  sides  very 
feebly  divergent  posteriorly,  longer  than  the  width  at  base,  feebly  arcuate, 
more  distinctly  so  toward  the  apices  ;  together  broadly  and  rather  feebly 
emarginate  behind;  suture  slightly  longer  than  the  pronotum;  surface 
rather  broadly  depressed  toward  the  basi^,  very  coarsely,  extremely  closely, 
('eeply,  and  irregularly  channeled,  interspaces  acute.  Abdominal  segments 
decreasing  uniformly  and  extremely  gradually  in  width,  first  distinctly  nav- 


80 


NOKTIl    AMEKICAN 


rower  than  the  conti^'noiis  elytra  ;  siirfiiec  sioincwliat  narrowly  and  Htnmfrly 
convi'X,  linely,  fcclily,  nvt-iily,  and  distantly  punctiilate,  interspaces  lii<,'lily 
jjiilislii'd  ;  transverse  earinae  trieus]iicl,  eiisps  all  ronndeil,  liread,  soniewhat 
jironiineiit,  and  hecdtnin}^  ainalj,'aniateil  witli  the  f^eneral  snrt'ace  of  the  seg- 
ment'. Legs  long  and  slender,  pale  rnfo-piceous  ;  lirst  joint  of  posterior  tarsi 
more  tlian  tliree  times  as  lonj;  as  tlii'  se('on<l,  and  twice  as  lon<;  as  the  fifth, 
joints  two  to  four  nnit'ormly  and  f^raduaily  decreasing  in  length. 

Mali'. — Snrfaces  of  the  third  and  fourth  ventral  segments  flattened  through- 
out their  middle  fourth  and  tiiird  res))ectively,  edges  of  flattened  area  provided 
with  very  long  downwardly  and  inwardly  curvate  setae,  edges  of  segments 
Scarcely  modified  ;  fifth  segment  emarginate  in  its  middle  third  at  apex, 
emargination  evenly  rounded  throughout,  slightly  mor(!  than  four  times  as 
wide  as  deep,  coniiguous  surface  deeply  and  cyliiidi'ically  impressed  through- 
out anteriorly,  borders  of  impression  liaving  setae  similar  to  tliose  of  the  third 
ami  fourth  .segments  ;  sixth  segment  sinuate  at  apex,  sinus  scarcely  one-half 
as  wide  as  the  apices,  acutely  rounded  at  bottom  and  at  the  exterior  angles, 
slightly  wider  than  <leej) ;  seventh  seguient  very  deeply,  broadly,  and  roundly 
emarginate  at  ai>ex,  teeth  well  developed,  directed  inward. 

Female. — Unknown. 

Length  4.4  mm. 

Sontlicrii  States  (locality  not  specified),  1. 
A  very  tlistinct  and  unmistakable  speoie.s. 


ITi.  S.  (lelaivarenSitS  n.  sp. — Form  slender.  Pubescence  very  short 
and  fine,  longer  on  the  abdomen,  where  it  is  recumbent,  fusco-cinereous. 
Head  mo<lerate,  twice  as  wide  as  long ;  interocular  surface  nearly  flat,  two  and 
one-half  times  as  wide  as  the  eye,  eciually  trihdied  by  the  distinct  sulcations, 
intermediate  surface  rather  strongly  and  evenly  convex  ;  ])unctures  round, 
miniito,  and  evenly  distributed,  interspaces  as  wide  as  tlie  punctures,  polished  ; 
ocular  lines  UKH-ting  at  om;  and  one-half  lengths  in  advance  ;  anttuinae  slen- 
der, slightly  longer  than  width  of  head,  piceous,  basal  joints  darker,  club 
moderate  ;  third  joint  one-third  as  long  again  as  the  fourth,  fourtli  and  fifth 
e(iual  in  length,  seventh  twice  as  long  as  the  eighth,  joints  of  club  increasing 
in  length,  last  joint  acuminate  at  tij) ;  maxillary  paljii  piceous,  first  joint 
paler.  Prothorax  widest  before  the  middle,  where  it  is  one-fifth  narrower 
than  long  ;  sides  thence  feebly  convergent  posteriorly  and  nearly  straight; 
posterior  margin  slightly  longer  than  the  anterior,  equally  arcuate;  surface 
with  two  rudimentary  tuberculations  at  each  side,  very  feebly,  minutely, 
and  somewhat  irj'egularly  punctate,  intersi)aces  generally  twice  as  wide  as 
the  punctures,  shining  ;  canaliculation  well  marked,  fusiform,  bottom  round- 
ing, conmiencing  before  the  middle  and  extending  jmsteriorly  a  distance 
ei^ual  to  ont!-half  the  total  length,  deeper  posteriorly.  Elytra  at  base  about 
as  wide  as  the  head  ;  sides  feebly  divergent  posteriorly  and  very  feebly 
arcuate,  about  equal  in  length  to  width  at  base  ;  together  very  broadly  and 
som«!what  feebly  emarginate  posteriorly  ;  suture  equal  in  length  to  pronotum  ; 
surface  slightly  impressed  on  the  sutui-e,  rather  depressed,  very  unevenly 
punctured,  near  the  inner  basal  angles  the  punctures  are  very  fine  and 
round,  interspaces  twice  their  w  idth,  shining  ;  near  the  outer  apical  angles, 


COLEOI'TERA. 


31 


tlit'i-c  is  an  oval  patch  wliicli  is  coarsely,  very  closely,  mid  tortuously  chan- 
neled. Abdominal  sc<j;iiients  decreasing  extremely  gradually  and  regularly 
in  width,  first  as  wide  as  the  contigU(jns  elytra  ;  border  at  lirst  very  j)ronii- 
nent:  surface  convex,  extremely  finely  jiunctulate  ;  transverse  ciirinae  tri- 
cuspid, middle  cusps  line  and  acicular,  lateral  rudimentary,  intervals  broadly 
sinuate.  I'nder  surface  pice<i\is.  Legs  moderate,  pale  piceous-brown  ;  lirst 
joint  of  posterior  tarsi  two-thirds  longer  than  the  second,  second  nearly  ixt 
long  as  till-  third  and  fourth  together. 

Mule. — I'nknown. 

Fiiuiili . — Posterior  edge  of  the  sixth  ventral  segment  very  evenly  rounded. 

Length  3.;5  mm. 

Middle  States,  1. 

TIk!  clytral  sculpture  of  this  spt'(!ies  is  so  peculiar  that  it  eaii 
scareely  be  inislakeii  if  at  all  constant  ;  the  oval  channeled  patch  is 
(jiiite  isolated  in  a  generally  smooth  Held. 


1(1.    S.   sectutor  n.  sj>. — Form  very   moderately   robust.      Pubescence 
rather  short,  coarse,  semi-erect,  much  nior<'  iilcntifiil  along  the  sides  of  the 
al)d(jmen,   fulvous   tluduglioiit.      Head   moderate    in    size,   twicer   as   wide  as 
long  :   interocular  suifact^  moderately  depressed,  longitudinal  elevaiion  nar- 
rower than  the  lateral  portions,  very  strongly  and  evenly  convex,  suli;ations 
very  prominent;  punctures  close,  deep,  rather  confused,  longitudinally  elon- 
gated;  ocular  lines  meeting  at  one  length  in  advance;    antennae  slender, 
slightly  longer  than  the  width  of  head,  basal  joint  black,  remainder  rather 
pale  pic(!OUs-brown,  club  moderates ;   third  joint  sliglitly  less  than  one-half 
longer  than  the  fourth,  fourth  and  fifth  equal  in  length,  sixth  very  slightly 
longer  an<l  much  thinncir  than  the  seventh,  eighth  nearly  twice  as  long  as 
wide,  slightly  thinner  than  the  seventh,  and  as  long  as  the  ninth,  joints  of 
club  increasing  in  length,  last  two  of  equal  thickness  and  more  robust  than 
the  ninth;    maxillary  palpi  piceous-brown  throughout,  first  joint  scarcely 
perceptilily  paler.     Prothorax  widest  at  the  middle,  where  it  is  distinctly 
narrower  than  long  ;  sides  thence  equally  convergent  anteriorly  and  poste- 
riorly, slightly  arcuate  in  the  former,  deeply  sinuate  in  the  latter  direction  : 
anterior  and  posterior  margins  nearly  equal  in  length  and  curvature  ;  surface 
distinctly  tuberculate  at  a  short  distance  from  each  basal  angle,  and  slightly 
impressed  on  the  Hanks  of  the  pronotuni  in  the  middle,  finely,  very  closely, 
confusedly  punctate,  interspaces  granulose  and  scarcely  shining  ;  ('analicu- 
lation  short,  narrow,  and  very  deep,  deft-like,  one-half  as  long  as  the  pro- 
notuni, beginning  slightly  before  the  middle.     Elytra  at  base  as  wide  as  the 
head  ;  sides  feebly  divergent  posteriorly,  slightly  longer  than  the  width  at 
base,   distinctly    and   nearly  evenly   arciuate ;    together   broadly    and    very 
moderately  emarginate  behind  ;    suture  nearly  one-fourth  longer  than  the 
pronotuni ;  surface  feebly  impn-ssed  on  the  suture  at  the  base,  moderately 
coarsely,  closely,  somewhat   deeply,   and   very   irregularly  punctured    and 
channeled,  interspaces  as  on  the  pronotuni,  tiiough  slightly  broader.    Abdo- 
minal segments  decreasing  just  perceptibly  in  width,  first  slightly  narrower 
than  the  contiguous  elytra  ;  surface  finely  and  closely  punctulate,  and  dis- 


82 


NOUTII    AMKUICAN 


tinctly  Ri'niiulosc  ;  transverse  (iarinao  tricuspid,  lateral  cusjis  imicli  sinaller 
than  tli<'  iiiiddli',  the  latter  fnicly  ancl  rapiilly  acuminata  toward  tips.  Legs 
moderate,  dark  ideeous-lirown,  nearly  black  aliove,  dark  t'usco-piceous  be- 
neath ;  llrst  joint  "f  the  posterior  tarsi  four-lifths  longer  than  tlie  second,  and 
as  Ion;:  as  the  next  two  to^etlier,  slightly  longer  than  the  last.    Hody  winged. 

Mill'. — Fipiirth  ventral  segment  eylindiically  and  feebly  impressed  in  its 
middle  third,  edge  entire ;  fiftli  segment  eniarginate  in  its  mi(hlle  third  at 
ai)ex,  emargination  evenly  loundeil  ami  nearly  seven  times  as  wide  as  ileep, 
contiguons  snrt'ace  eylindrieally  and  rather  deejily  impressed  nearly  through- 
out anteriorly;  sixth  segment  sinuate  at  apex,  sinus  mncli  narrowei'  and 
more  acutely  roundeil  than  the  iipiees,  slightly  more  than  one-third  wider 
than  (h'ej)  ;  seventh  segment  broad  and  robnst,  nearly  transversely  truncate 
at  tip,  lateral  setae  small. 

Fi'inulf. — Sixth  segment  very  broadly  and  (evenly  rounded  behind. 

Length  ;^. -4-4.(1  mm. 

Washington  Territory  (Thurston  Co.  and  Tonino),  4. 


17.  S.  ZUIlicilS  n.  sp. — Form  somewhat  robust.  I'libescence  rather  close, 
coarse,  more  abundant  on  the  abdomen,  wliere  it  is  very  pale  tlavo-cinereous, 
elsewhere  plumbed-cinereous.  Head  moderate,  twice  as  wide  as  long;  inter- 
ocular  surface  just  percei)tibly  depressed,  more  than  twice  as  wiih;  as  the 
eye,  longitutlinal  elevation  as  wide  ns  the  lateral  portiors,  evenly  and  feebly 
convex;  punctures  moderate  in  size,  rounded,  deep,  isolated  and  unevenly 
distributed,  interspaces  nearly  Hat  and  somewhat  polished  ;  ocular  lines 
meeting  at  fully  two  lengths  in  advance  ;  antennae  longer  than  the  width  of 
liead,  slender,  basal  joints  black,  remainder  dark  j)iceous-brown,  club  dis- 
tinct ;  third  joint  scarcely  one-eighth  longer  than  the  fourth,  joints  threti  to 
six  uniformly  decreasing  in  length,  sixth  and  seventh  eonal  in  length,  the 
hitter  much  the  thicker,  eighth  one-half  longer  tlnn  wi(h',  strongly  conical, 
base  small,  joints  of  club  inci-easing  very  gradually  in  length,  nearly  of  ecjual 
width  :  maxillary  palpi  well  developed,  first  joint  dark  piceous-brown,  second 
slightly  darker,  third  piceous-hlack,  nearly  as  long  as  the  first  and  second 
together,  rather  robust,  densely  setose.  Prothorax  arcuately,  almost  evenly 
and  rapiilly  increasing  in  width  to  the  middle,  where  it  is  six-sevenths  as 
wide  as  the  head,  and  <listinctly  narrower  than  long  ;  sides  thence  feebly 
convergent  posteriorly  and  slightly  sinuate  ;  anterior  margin  shorter  and 
much  more  arcuati'  than  the  posterior;  surface  tuberculate  near  the  basal 
angles,  finely,  cleei)ly,  and  somewhat  closely  punctate,  punctures  somewhat 
rounded  and  distinct,  crowded  anteriorly,  and  isolated  by  nearly  their  own 
widths  in  the  middle,  inters])aces  rather  feel)ly  convex  and  shining;  canali- 
culation  beginning  at  the  mi<ldle,  one-third  as  long  as  the  prcniotum,  rather 
narrow,  impressed,  somewhat  shallow  but  distinct.  Elytra  at  base  as  wide 
as  the  head  ;  sides  rather  feebly  divergent  jiosteriorly,  slightly  longer  th.an 
the  width  at  base  and  very  feebly  arcuate,  more  strongly  so  toward  the 
apices  ;  together  broadly,  roundly,  and  distinctly  emarginate  behind  ;  suture 
nearly  one-third  longer  than  the  pronotuni ;  surface  strongly  and  broadly 
impressed  on  the  suture  at  the  base,  also  very  feebly  so  mar  the  humeri, 
somewhat  closely,  finely,  and  very  irregularly  punctate,  somewhat  channeled 


COLKOPTEUA. 


88 


ill  thfl  iiciKlihnrlinod  of  <li(>  Hpiral  jnut  bfliind  tlio  centre,  and  ncai-  tlic  oxtti- 
I'idi'  iiini'tjin  of  i-acli  rlytr.>n,  intcrsiiaccs  Hoiiit'wliat  Hat  ami  sliininj^  near  tliu 
suture  and  the  liasc  Abdominal  scginenta  decreasing  uniformly  and  gradu- 
ally in  widfli,  first  very  sliizlitly  narrower  than  the  (.'onti<,'Uoiirt  elytra;  sur- 
face strongly,  finely,  soinewiiat  closely  and  evenly  punctiilate,  much  more 
minutely  so  posteriorly,  interspaces  liiglily  polished  and  flattened  ;  trans- 
verse carinau  tricuspid,  cusps  all  long  and  nearly  of  e(nial  length,  middle 
liiiely  acicular,  lateral  rather  coarsely  acuminate.  Legs  moderate,  piceoiis- 
Mack  aliove,  fuscous  hi'iieatii  ;  lirst  joint  of  jiosterior  tarsi  two-thirds  longer 
than  the  second,  as  lon;^  as  the  'lext  two  together,  and  as  long  as  the  fiftii. 

Afdie. — Third  and  fourth  ventral  segments  just  visibly  emarginatt!  in  the 
mid<lle  fourth  and  third  respectively,  contiguous  surfaces  V(!ry  feebly  flat- 
tened; fifth  segment  emarginate  in  the  middle  thinl  at  apex,  emargination 
more  acutely  rounded  at  the  bottom,  sides  nearly  straight,  six  times  as  wide 
as  det!]),  contiguous  surface  strongly  flattened  throughout  anteriorly  ;  sixth 
segment  very  deei)ly  and  strongly  bilobed  at  tip,  cusp  narrow,  arms  near 
the  apex  nearly  straight,  point  very  slightly  rounded,  emargination  nearly 
twice  as  wide  as  deep  ;  seventh  segment  <leeply  (Muarginate  at  tip,  bottom  of 
emargination  nearly  transvers<',  ti-eth  strong. 

FiiiKile. — Sixth  segment  bioadly  and  evenly  rounded  behind. 

Length  3.4-4.0  mm. 

\rizonu  (Morrison),  5. 


18.  S.  femoratllS  Say. — Form  moderately  robust.  Pube.scence  short, 
coarse,  rather  sparse,  sub-erect,  fulvous  on  the  abdomen,  cinereous  elsewhere. 
Head  robust,  more  than  twice  as  wide  as  long ;  interocular  surface  distinctly 
depressed,  twice  as  wide  as  the  eye  ;  longitudinal  elevation  slightly  narrower 
than  the  lateral  portions,  (sviuily  and  moderately  convex,  sulcations  rather 
prominent;  punctures  fine,  rounded,  evenly  distributed,  and  in  exceedingly 
close  contact ;  ocu....r  lines  meeting  at  nearly  one  length  in  advance;  antennae 
very  slightly  longer  than  the  width  of  head,  shaider,  basal  joint  black, 
remainder  piceous-brown,  club  darker  and  prominent ;  third  joint  one-third 
as  long  again  as  the  fourth,  fourth  and  fifth  equal,  sixth  and  seventh  equal 
in  length,  the  latter  slightly  more  roViust,  eighth  joint  one-lialf  longer  than 
wide,  oval,  as  thick  as  the  seventh,  joints  of  club  increasing  slightly  in 
length,  elongated,  last  two  of  equal  width  ;  maxillary  palpi  sbuider,  pale 
liiceous-brown,  basal  joint  and  base  of  the  second  pale  piceo-testaceous,  third 
joint  very  long  and  somewhat  sigmoid.  Prothorax  widest  slightly  behind 
the  middle,  where  it  is  very  slightly  narrower  than  the  head,  and  slightly 
narrower  than  long ;  sides  thence  equally  convergent  anteriorly  and  poste- 
riorly ;  anterior  margin  much  shorter  than  the  base,  the  former  very  arcuate, 
the  latter  very  feebly  so  ;  surface  strongly  tuberculate  at  a  short  distance 
from  each  basal  angle,  tr.ansversely  impressed  just  behind  the  apex,  finely, 
extremely  closely  and  irregularly  punctat-  ;  canaliculation  beginning  slightly 
before  the  middle,  one-third  as  long  as  the  pronotum,  narrow,  acute  at  bot- 
tom, and  very  deep,  conspicuous.  Elytra  at  base  very  slightly  narrower 
than  the  head  ;  sides  moderately  divergent  posteriorly,  as  long  as  width  at 
hase,  rather  strongly  arcuate,  more  particularly  toward  the  apices  ;  together 
Stenini.  3  , 


9^ 


NORTH    AMKKICAN 


broadly,  roiiniUy,  nml  rntlit-r  strongly  t'lnnrginnt*!  lieliind  ;  sntiiro  very 
Hliglitly  loiiX''r  tli.'iii  tilt'  prdiKituni ;  siirl'ai'i^  coiivcx,  very  feclily  inii)r('HSHil 
on  till!  xutnrt;  iit  thf  l);isc,  rather  finfly,  very  ilt'cjily,  cxofiMlingly  (closely 
and  irregularly  elianneled.  Abdominal  segments  deereasinj^  uniformly  and 
rapidly  in  widtli,  lirst  distinctly  narrower  than  the  eontignons  elytra  ;  siirfaeo 
finely,  very  closely,  and  eVenly  )>iinctnlate ;  transverse  earinaii  tricnsjtid, 
tnidiUe  cusjis  liiii'  an<l  acicnlate,  lateral  very  short.  Legs  short  and  rolmst,, 
palt)  piceo-rufuus ;  lirst  joint  of  jiosterior  tarsi  two-thirds  as  long  again  as 
the  second,  and  as  long  as  tlio  last,  joints  two  to  four  uniformly  and  rapidly 
decreasing  in  length. 

Midc. — ^^ecoJld,  tiiird,  and  fourth  ventral  segments  having  in  the  middle 
and  at  thu  npex  a  small  triangular  area,  which  is  lustrelcHS  and  very  minutely 
reticulated  ;  fifth  segment  eniargiiiate  in  its  middle  fourth  at  apex,  emargi- 
nation  evenly  rounded,  eight  times  as  wide  as  deeji,  contiguous  surface 
feebly  impressed  ;  sixth  segment  triangularly  incised  at  the  apex,  incisure 
sliglitly  wider  than  deep;  seventh  segment  hroatlly  and  triangularly  euuir- 
ginate  at  apex. 

FiiiKile, — Sixti.  segment  broadly  and  evenly  rounded  behind. 

Length  3.4-4.2  mm. 

Detroit,  IMicliigiiii,  1(!;  Illinois,  1  ;  Wa.sliington,  1).  C,  1;  Grimsby, 
Ontario,  2. 

A  vi'iy  distiiu't  s|)ccies  in  many  ways,  more  especially,  however,  in 
the  curious  triaiijiuhir  patclies  at  the  api(;i'S  of  the  ventral  scjinuMits 
in  the  male.  'V\h'  male  sexual  characters  seem  to  vary  not  a  little 
in  degree,  and  sp(!cimens  are  seen  in  wliich  the  emargiiuition  of  the 
fifth  segment  is  jnat  perceptible,  and  in  which  the  angle  of  the  incisure 
at  the  ajiex  of  tin;  sixth  segment  is  distinctly  rounded.  Delinite 
varieties  or  subsi>ecies  nuiy  be  indicated  by  these  variations. 

19.  S.  tacoiliac  n.  sji. — Form  very  moderately  rolmst.  Pubescence  fine, 
very  sparse,  except  along  the  sides  of  tht^  abdomen,  short,  semi-erect,  llavo- 
cinereous.  Head  moderate,  twice  as  wide  as  long  ;  interocular  surface  rather 
deeply  excav.'ited,  nearly  three  times  as  widt(  as  the  eye,  equally  trilobed  by 
the  longitudinal  sulcuti(»ns,  which  are  feeble  ;  intermediate  surface  feebly 
and  evenly  convex,  punctures  rather  fine  ;  ocular  lines  meeting  at  about  one 
length  in  advance,  strongly  ourvate ;  antennae^  longi^r  than  width  of  bead, 
robust,  black,  club  distinct ;  third  joint  fully  one-lialf  as  long  again  as  the 
fourth,  fourth  and  fifth  etiual,  sixth  slightly  longer  and  distinctly  less  robust 
than  the  seventh,  eighth  nearly  twice  as  long  as  wide,  cordate,  joints  of  club 
of  nearly  equal  width,  sligbtly  increasing  in  length.  Prothorax  widest 
slightly  before  the  middle,  where  it  is  distinctly  narrower  than  long  ;  sides 
thence  very  moderately  convergent  posteriorly  ;  anterior  margin  sliglitly 
longer  and  more  arcuate  than  the  posterior  ;  surface  nearly  evenly  convex, 
very  finely,  exceedingly  closely,  and  irregularly  punctured  and  channeled, 
interspaces  acute  ;  canaliculation  very  short  and  feeble,  beginning  slightly 
before  the  middle,  and  equal  in  length  to  one-third  that  of  the  pronotum. 
Elytra  at  base  as  wide  as  the  head ;  sides  nearly  parallel,  much  longer  than 


COLKOI'TKUA. 


3:» 


tlio  Nvidtli  at  base,  ftiicl  very  I'l'clily  aiciialc  ;  togctlu'r  soiiu'wliat  narrowly, 
roiiiully,  anil  vi-ry  ntroiigly  rniarjiiinatc  Ijcliind  ;  siitiirt'  ontt-Mixtli  as  l(Pii<^ 
again  as  tin;  ])riin<ituni ;  surfacf  Huuicwliat  fVdily  convex,  nearly  even,  (!X- 
ceedinu'ly  closely  anil  very  irrejjiilariy  clianneli'il,  interspaces  v<'ry  acute. 
Abdominal  se^^inent.s  decreasing  uiiiforndy  and  moderately  rapirlly  in  width, 
lii'st  just  peiceptilily  narrower  than  tlie  contij^uons  elytra  ;  surface  cuarsely 
;,'ranulose  and  lustreless  ;  margin  vory  strong;  transverse  carinae  not  cusped. 
Legs  rather  luuf^  and  hU'ikIlm-,  Idauk ;  lirHt  joint  of  tlio  posterior  tarsi  much 
elongated,  two-thirds  as  long  again  as  the  second,  and  much  longer  than  the 
last,  second  joint  nearly  as  long  as  the  third  and  fourth  together;  tarsi  of 
nearly  etiu  .    thickness  throughout,  rather  slendiu', 

iMtilc. — Fifth  ventral  segment  very  t'euhly  enuirginatc!  in  its  middle  th'rd 
at  a|iex,  emargination  evenly  .  lunded  and  scarcely  measural)le,  I'ontiguous 
surface  feelily  and  eylindrically  impressed  throughout  anteriorly  ;  sixth 
segnuMit  sinuate  at  apex,  sinus  rather  wider  and  moro  feebly  rounded  than 
the  apices,  evenly  rounded,  and  about  (Ivo  times  ns  wid(!  as  ileep ;  seventh 
segment  triangularly  and  moderately  emarginato  at  ai)ex,  lateral  setae  well 
developed, 

Fe.mali'. — Unknown, 

I/(mgtli  3,0  mm. 

Tliurstoii  County,  Wasliinfitoii  Territory,  1, 

A  closer  scrutiny  reveals  the  tact  tiuit  tin-  tran,sver<e  carinae  on 
some  oi"  the  segments  apjjeur  to  be  very  minutely  4-cus[)iil,  on  otliers 
even  this  sign  disappears,  and  tlien;  is  nothing  to  he  s(ien  hut  an 
irregular  denticnlation  ol"  th«;  ciirintil  edge.  This  eont'ornialion  will 
immediately  distinguish  the  species  from  several  others  from  the  same 
region  ;  the  latter  liuving  the  carinae  distinctly  tricuspid. 

Subdivision  6. 

This  subdivision  contains  a  very  large  proportion  of  the  species  of 
division  B;  they  may  be  resolved  for  sake  of  convenience  into  three 
arbitrary  groups  as  follows  : — 

Length  exceeding  2  mm. 

I'llytral  suture  not  more  than  one-third  longer  than  the  pronotum 1. 

Klytral  suture  at  least  one-half  longer  than  the  pronotum II. 

Minute  species  not  exceeding  2  mm.  in  lengtli III. 


Group  I, 

We  are  still  confronted  in  this  group  by  nearly  one-half  the  entire 
number  of  species  of  the  genus  Stcnns,  and  their  tabulation  in  such 
a  manner  as  to  give  a  useful  and  succinct  character  to  each  form  is 
almost  an  impossibility.  We  may,  however,  simplify  the  subject 
slightly,  by  the  following  subgrouping : — 


86  NORTH    A.MKUK'AN 

Ti'.'nisvt'i'Mc  cnrinni^  of  aluloincn  li'i<'nsj)iil a, 

Ti'iiiihVt'rsc  oHi'inac  4-('UH|iiil h. 

TrautiVt'i'Nf  caiiiint-  not  cuttpfil <■. 

Huligroup  ((. 

In  this  siihfjfoiip  I  Iiavc  employed  several  siihsidijirv  elianicters, 
(lepeiidinj;  upon  tin'  form  of  liody  and  sexual  modification  ol"  (lie  male 
in  order  It)  form  lour  sections  as  follows  : — 

Fdini  extremely  slendci',  ni'avly  eyliiidriral ;  elytra  iiincli  slierter  tlian  the 
prothurax  ;  lieail  inucli  wider  tlian  tlie  elytra;  length  H.l-;{.4  mm. 

20.  HtraiiKulatiis. 


l-'onii  very  slendi^r,  conHpicuously  depressed  ;  sides  nearly  i)arallel  ;  alulonien 
fully  na  wide  as  tho  contiguous  elytra  ;  segments  decreasing  extremely 
slow  y  in  width,  and  usually  strongly  extended  after  death  ;   length 
'2.S-;i.7  mm.* 
I'rothorax  widest  distinctly  before  the  middle. 

IClytral  suture  and  jironotum  nearly  fi|U!\l  in  length. 

Form  ex('((ssivcly  slender  ;  elytral  punctures  coarse  and  rather  distant. 

21.  tennis. 

Form   slightly   more    robust  ;    elytral    jjunctures    liner    and    closely 

crowded 22.  aiignstns. 

Elytral  suture  nuu'h  longer  than  the  jironotum. 

Sixth  ventral  segment  %  (leej)ly  and  rather  narrowly  sinuate  jiosti'- 

riorly 23.  diflicilis. 

Sinus  of  sixth  segnuuit  %  extremely  hroad  and  feehl(\..24.   I*(>tfiti. 
Prothorax  widest  at  or  slightly  heliind  the  middle 25.  sci'npens. 

§§§ 

Male  having  the  lateral  borders  of  the  impressed  area  of  the  fifth  ventral  seg- 
ment, in  the  form  of  r-dges  which  ternunate  posteriorly  in  acute  teeth. 
Large  species.     Length  3.7-4.8  mm. 


*  Tho  insects  in  this  small  section  increase  gradually  in  robustness  in  the 
order  given  from  Uniiis,  which  is  very  slender  and  more  liliform  than  any 
other  within  our  territory,  to  scruji'iis  which,  although  elongated,  is  slightly 
more  robust  than  two  or  three  of  the  next  section,  as,  for  instance,  siihtili.t, 
imlitjfnf,  and  iuijrtitiis;  it  will  therefore  be  merely  safer,  if  the  species  be  a 
slender  one,  to  first  consult  this  table  and  its  accompanying  descriptions 
before  proceeding  to  the  larger  table  following.  Tlie  section  is  retained  dis- 
tinct because  of  tho  depressed  appearance  as  well  as  the  slender  form  of  the 
species  comprised  within  its  limits.  The  protrusion  of  tho  abdomen  may 
result  from  the  manner  in  which  the  insects  are  killed;  if  in  alcohol  the 
abdomen  is  generally  protruded.  I  can  only  state  that  in  all  the  specimens 
before  mo  the  abdomen  is  extended,  and  do  not  pretend  to  assert  that  this  is 
a  physiological  peculiarity. 


rOLKOI'TEIlA. 


n? 


IIi'.'uI  \viili>  ,'iiicl  ri)l>ii>it,  as  liroiiil  as  <ir  liroailt-r  tli/iii  tlm  elytra. 

[..'•^s  Mack 'ill.   illtrilHiiH. 

I.('}j;s  ratlicr  |iali-  ]ii('i>nnM-liro\vn '27.  orytlll'opils. 

Ili'.id  small,  narrower  tliaii  tlie  elytra;  piiiuttiiatioii  iiiiu'li  closer. 

I'mictiires  of  nl)cloini>)i  extremely  closely  (;ro\vile(l ;  mirfaco  opaipie.    Ili'.iit 

les-*  tliaii  twice  us  wiile  as  loll;,',     Cdlorail" 2S.   rilKilVr. 

riiiicttires  of  al)4omeii  less  crowileil ;  intersiiaoes  distinctly  visidle,  sliiii- 
iii;;.  Heail  distinctly  more  tlian  twiuo  an  wide  as  lonj;.  White  Moun- 
tains, N.  H 20.  aiiuHtoinozaiiH. 


mi 

Tlic  ftillowiii^  talile  is  simply  iiiU'inlcil  as  mi  indication  of  tlio 
approximate  position  of  tim  species,  ami  is  only  to  bi;  (Icpcmled  upon 
as  an  aid  to  tlit)  consultation  of  tin;  descriptions  : — 

Elytral  suture  in  len^'tli  e(|ual  to  or  sliorter  than  the  promitnm. 

I'i'otliorax   wi<ier  than    louj,',  scarci'ly   narrower    than   the    head.      I'onu 

roliiiKt,  depressed :il>.  Hll<»Mll<>liis. 

I'rothorax  narrower  than  lonj;. 

I.arye  spucit^s  4.0-4.2  mm.  in  lengtli,  slender.     Vancouver  Island. 

:!1.  iiisiilariH. 
ypecies  not  oxceedinj;  li.l  mm.  in  h'iii,'tli. 

Robust,  depressed;  olytral  sculpture  very  coarse.    \VHsliint,'t()ii  Tciri- 

tory ;12.  vt>xatlls. 

Much  more  slender,  rather  conv(^\  or  suh-cylindriual  ;  elytral  sinilp- 
ture  ratlior  lino  and  even.     Massachusetts. 
I'rotliorax  widest  before  the  middle. 

c<I)ecies  2.b-IJ.()  mm.  in  length  ;   hea<l  large  ;    interocular  Hurface 

rather  deeply  excavated 'M.   Sc'llWai'Zi. 

Hpecies  2.1-2.3  mm.  in  longtli ;  head  small. 

Longitudinal  elevation  of  interocular  surface  distinct ;  sides  of 

elytra  distinctly  divergent  posteriorly :{4.  |iaillll'l'. 

Longitudinal  ehivation  obscure  ;  sides  of  elytra  almost  exactly 

])arallel ^.O.  siilitilis. 

Prothorax  wiih'st  behind  the  middle  3(J.  iiidigeiis. 

Elytral  suture  longer  than  the  pro)iotum. 
Species  3.0  mm.  or  mor(!  in  length. 

Longitudinal  elevation  of  interocular  surface  indistinct  or  nearly  obsolete, 
("analiculation  of  prothorax  very  shurt,  rather  conspicuous,  situated 

behind  the  middle.     Oregon 37.  simplex. 

Canaliculation  very  fei^bh:,  ext(Midiiig  nearly  the  entire   length  of 
the  pronotum.     District  of  Cohimljia,  reiinsylvania,  Alabama. 

3S.  viciiiiis. 
Canaliculation  excessively  feeble,  btuiig  reduced  to  a  sinqile  erosion, 

situated  just  behind  the  mi(bile 39.  iligratllS. 

Longitudinal  elevation  of  interocular  surface  distinct. 

Large  species,  about  4.0  mm.  in  length 40.  lieglectllS. 

Smaller  species,  not  exceeding  3.3  mm.  in  length. 


38 


NORTH    AMEHICAN 


IIi'.iil  larj;*^,  luiioh  wider  than  the  elytra  at  base. ...41.  scabiosiis. 
Head  small,  narrower  than  the  elytra  at  base. 

Body  very  robust ;  elytra  very  feebly  impressed  on  the  suture  at 
the  base  ;  longitudinal  elevation  of  head  rounded. 

42.  -vespertiiiiis. 
Body  mn<'h  more  slender  ;  elytra  strongly  impressed  on  tlie  suture 
at  the  base;  longitudinal  elevation  of  head  rather  aeute. 

43.  convictoi*. 

Species  less  than  3.(1  mm.  in  length. 

Longitudinal  elevation  of  iiead  acute  and  prominent;  canaliculation  of 

]ironotum  short,  de(>p.  and  conspicuous 44.  COIlfllSllH. 

Longitudinal  idevation  ratiier  obscure,  broadly  rounded  ;  canaliculation 
of  pronotum  very  ol)scuro,  '.eing  simjjly  a  very  feeble  erosion,  in 
some  cases  almost  obsolett!. 
I'rotliorax  widest  distinctly  before  the  middle. 

Larger  apecie.s.    Legs  black  45.  inoi'iiatiis. 

Smaller  s])ecies.     Legs  fuscous 40.  lllacidllS. 

I'rotliorax  widest  at  or  beliind  tlie  middle. 
Sides  of  prothorax  nearly  straight  in  front  of  the  broadest  section, 
at  which  point  they  are  rather  acutely  angulate.     Massachusi^tts. 

47.  mendax. 

Sides  of  prothoraj.  strongly  rounded  anteriorly,  not  angulate,  broadly 

roumled  at  the  widest  section 4S.  ei'ieiisis. 

Subgroup  h. 

Head  large;,  much  wider  than  the  elytra  at  base 49.  spllicrops. 

Head  e(iual  in  width  to  the  elytra  at  base 50.  Illilitai'is. 

Head  distinctly  narrower  than  the  elytra  at  base. 

Head  extremely  t:  J, all ;  interocular  surface  broad;  eyes  narrow.     Massa- 
chusetts  51.  plilto. 

Head  slightly  broader  ;    interocular  surface  narrow  ;  eyes  wide  and  very 
convex.     Arizona 52.  illCUltUS. 

Sr.bgroup  c. 

Elytral  sutui  ■  much  shorter  than  the  pronotum  53.  ptei'Obracliys. 

Elytral  sutun'  distinctly  longer  than  the  pionotum. 

Prothorax  distinctly  elongated  ;  legs  black  throughout ;  form  robust  ;  elytra 
finely,  deeply,  evenly,  and  \ery  closely  punctate  ;    surface  rough  and 

nearly  opaciue 54.   corviia. 

Prothorax  about  as  wide  as  long  ;    legs  not  black  ;    form  more  slender ; 
elytra  coarsely  punctate  :  surface  generally  shining. 

Ijarge  species,  4.2-4.5  mm.  in  length 55.  inaritiiniis. 

Small  species,  not  exceeding  3.0  mm.  in  length. 

Form  slender  ;   punctures  of  elytra  airiest  entirely  isolated.     White 

Mountains,  N.  11 5ti.  moiltaillis. 

Form  more  robust;    somewhat  depressed;   punctures  of  elytra  gene- 
rally close  and  coalescent.     Colorado  and  Britisli  Columbia. 

57.  alpicola. 


COLEOPTERA. 


89 


■oliiacliys. 


laritimus. 


20.  S.  gtranglllatus  n.  sj).  (l-'auvel  MS.). — Form  very  slomliM'.  Piibus- 
ociice  exccssivi'ly  sliort,  HiU',  and  sparse,  sotiform,  ciDornous.  Head  v«ry 
large,  luit  twic((  as  wiilo  as  long  ;  inti'rociilar  surface  tiirec-foiirtlis  as  wide 
again  as  tlio  eye,  ratlier  (h^eply  excavated,  finely  and  feebly  imnetared, 
interspaces  (^qnal  in  wiilth  to  the  punctures,  shining,  minutely  reticu- 
lated ;  longitudinal  suleations  closely  a])proxiniate  and  distinct  ;  inter- 
mediate surface  very  moderately  and  (!V(M\ly  convex  ;  ocular  lines  meeting 
at  less  than  one  length  in  advance  ;  antennae  very  long  and  slender,  much 
longt'r  than  width  of  head,  dark  piceous-brown  throughout,  club  narrow  : 
third  joint  tbice-foui'ths  as  long  again  as  tin;  fourth,  and  nearly  as  long  as 
the  fourth  and  fifth  together,  fourth  and  fifth  e(iual,  eighth  one-half  as  long 
as  the  seventh,  joints  of  club  increasing  in  h^ngth,  last  joint  nearly  as  long 
as  the  ninth  and  tenth  together;  maxillary  palpi  long  and  slender,  pale 
testaceous  throughout,  last  joint  much  elongated.  Prothorax  widest  slightly 
before  the  middle,  where  it  is  three-fourths  as  wide  as  the  head,  and  one-fifth 
narrower  than  long  ;  sides  from  the  middle  rather  strongly  converg(!nt  poste- 
riorly and  strongly  sinuate  ;  anterior  margin  longer  and  more  arcuate  than 
the  posterior  ;  surface  evenly  convex,  coarsely  and  very  irregularly  punc- 
tate, interspaces  at  some  spots  equal  in  width  to  tlu!  punctures,  somewhat 
shining  and  very  minut(dy  reti-nilated,  at  others  acut((  ;  canalii.'ulatioii 
almost  obsolete,  one-half  as  long  as  the  ])ronotum,  terminating  at  equal  dis- 
tances from  tlu!  anterior  and  posterior  margins.  Elytra  at  base  scarcely 
three-fourths  as  wide  as  thi>  head  ;  sides  very  feebly  divergent  post(!riorly, 
slightly  longer  than  width  at  base  and  rather  strongly  arcuate;  together 
broadly  and  just  perceptibly  emarginate  posteriorly;  suture  much  shorter 
than  the  pronotum  ;  surface  even,  somewhat  depressed :  very  coarsely, 
closely,  and  somewhat  irregularly  punctured.  Abdominal  segments  just 
perceptibly  decreasing  in  width  posteriorly,  llrst  as  wide  as  the  contiguous 
elytra  ;  border  prominent  ;  surface  very  convex,  coarsely,  feebly,  anil  dis- 
tantly punctulate,  moderately  shining  ;  transverse  carinae  tricuspid,  cusps 
acute  and  aciculate,  middle  twice  as  long  as  the  lateral.  Legs  very  long  and 
slender,  pale  piceous-brown  throughout  ;  first  join!  of  posterior  tarsi  some- 
what longer  than  twioe  the  second,  as  long  as  the  next  three  together,  second 
visibly  long"r  than  tlie  third. 

Male. — Posterior  edge  of  the  fifth  ventral  segmiiut  deeply  and  broai'ly 
emarginate  in  its  middle  third,  notch  four  times  as  broad  as  deep,  almost 
transverse  at  the  bottinii,  contiguous  surface  deeply  and  conically  iiupi'essed 
for  one-half  its  length  anteriorly,  borders  of  the  impression  in  the  form  of 
very  acute  ridges,  which  terminate  posteriorly  in  two  long,  very  acute  teeth, 
projecting  over  and  beyond  the  emargination  ;  sixth  segment  sinuate  at  apex, 
sinus  small,  four  timers  as  wide  as  deep,  and  evenly  rounded  at  tlui  bottom. 

Female. — Sixth  ventral  S(!gmeut  evenly  rounded  behind  throughout  its 
width. 

Length  3.1-3.4  mm. 


New  York,  1  ;  Detroit,  Mioliigan,  a. 
Very  distinct  and  unmistakable  in  form. 


40 


NOUTII    AMERICAN 


-1.  S.  tenuis  n.  sp. — Form  very  slender,  sides  parallel.  Pubeseenee 
liKideratcly  long,  line,  reeuiiilieiit,  sparse,  pale  i'ulvo-ciiiereous,  metre  fulvous 
on  the  abdomen.  Head  moderate,  twice  as  wide  as  long  ;  interouular  surface 
nearly  Hat,  equally  trilobed  by  the  very  feeble  sulcations  ;  intermediate  sur- 
face very  feebly  convex  ;  punctures  moderately  coarse,  evcaily  distributed, 
separated  by  one-half  their  own  widtlis  interspaces  sliining  ;  ocular  lines 
meeting  at  one  lengtli  in  advance  ;  maxillary  jtaljii  pale  piceous-brown,  basal 
joint  opaque,  llavate.  Prothorax  widest  slightly  in  advance  of  the  middle, 
wliere  it  is  distinctly  narrower  tiian  long;  sides  rather  strongly  converg(!iit 
and  jiiit  perceptibly  sinuate  posteriorly,  rather  b^ss  convergent  and  vei'y 
feebly  arcuate  anteriorly  ;  anterior  margin  sliglitly  longer  and  niucli  more 
arcuat(^  tlian  the  jiosterior  ;  surface  feel)ly  tuberculate  near  the  basal  angles  ; 
rather  Ihiely,  modei'ately  closely,  evenly  jmnctured  ;  jtunctures  irregular  in 
shape,  interspaces  rather  convex,  highly  polished  ;  canaliculation  just  visible 
as  a  narrow,  very  feeble  impression,  about  one-half  as  long  us  the  pronotum, 
terminating  at  nearly  equal  distances  from  the  base  and  apex.  Elytra  at 
base  just  perceptibly  narrower  than  the  head;  sides  moderately  divergent 
posteriorly,  longer  than  the  width  at  base  and  feebly  arcuate  ;  together  very 
broadly,  roundly,  though  moderately  emarginate  behind  ;  suture  very  slightly 
longer  than  the  pronotum  ;  surface  rather  dejjressed,  feebly  imp-essed  along 
the  suture,  more  particularly  toward  the  base,  coarsely  a  ..^.irly  evenly 
punctate,  intersi)aces  two-thirds  as  wide  as  the  punctures,  feebly  convex  and 
higlily  polished,  punctures  very  seldom  coalescent  and  then  only  partially  so. 
First  three  abdominal  segments  equal  in  width,  and  as  wide  as  the  contiguous 
elytra :  surface  finely,  evenly,  and  rather  distantly  punctulate  ;  punctures 
impressed,  interspaces  highly  polished;  posterior  edges  of  the  segments  im- 
punctate  ;  transverse  carinae  tricuspid,  middle  cusps  long  and  acicular,  lateral 
very  rudimentary.  Legs  rufo-fascous,  moderate  in  length  ;  last  joint  of  the 
anterior  tarsi  nearly  ecjual  in  length  to  the  three  preceding  together. 

Male. — Fifth  ventral  segment  emarginate  in  its  middle  fourth  at  ajtex, 
euiargination  evenly  rounded,  nearly  ten  times  as  wide  as  deep,  contiguous 
surface  feebly  impressed  throughout  anteriorly  ;  sixth  segment  triangularly 
incised  at  ap(!X,  incisure  small,  slightly  wider  than  deep;  seventh  segment 
feebly  and  roundly  emarginate  at  apex. 

Femalo. — Unknown. 

Length  3.2  mm. 

Grimsby,  Ontario,  1. 

The  type  specimen  is  in  a  very  dilapitlated  condition,  lacking  the 
antennae  and  jmsterior  tarsi.  Tlie  species  diff(!rs  from  dljfieilis  in  its 
much  more  slender  form,  sexual  ciiaracters,  and  sculpture. 


22.  S.  anglistlis  n.  sp. — Form  slender,  sides  parallel.  Pubescence 
sparse,  short,  line,  sub-recumbent,  ratlier  inconspicuous.  Head  moderate, 
twice  as  wide  as  long;  interocular  surface  more  tlian  twice  as  wide  as  the 
eye,  nearly  flat,  equally  trilobed  by  the  very  feebly  longitudinal  sulcations, 
intermediate  surface  rather  feebly  and  evenly  convex  ;  punctures  moderately 
small,  rounded,  not  coalescent,  evenly  distributed  and  close  ;   ocular  lines 


COLEOPTKUA. 


11 


meeting  at  nearly  two  lengths  in  advance  ;  antennae  distinctly  longer  than 
the  width  of  head,  moderately  robust,  piceous-brown,  basal  joint  black,  club 
very  slendctr  ;  third  joint  one-fourth  longer  than  tlu^  fourth,  fourth  and  fifth 
(Mjual,  sixth  and  sevi^nth  joints  much  shorter  than  the  fifth,  ecjual  in  length, 
the  latter  slightly  more  robust,  eighth  two-thirds  as  long  as  the  seventh, 
equal  to  it  in  width,  joints  of  club  increasing  in  length  and  thickness  ; 
maxillary  palpi  slender,  first  joint  opanue,  llavate,  second  and  base?  of  the 
third  very  slightly  darker,  piceo-llavate,  remainder  piceous-brt)\vn.  Pro- 
thorax  widest  much  before  the  middle,  where  it  is  distinctly  narrower  tlian 
long  ;  sides  thence  nearly  equally  convergent  anteriorly  and  posteriorly, 
distinctly  arcuate  in  the  former,  nearly  straight  in  the  latter  direction; 
anterior  margin  slightly  longiM-  than  the  posterior,  equally  arcuiite;  surface 
gradually,  narrowly,  and  feebly  swollen  toward  the  basal  angles,  rather 
coarsely,  VL'i-y  closely,  evenly,  and  sub-variti!ately  punctured,  punctures 
polygonally  crowded  ;  canaliculation  very  fe(d)le,  tenninalin^  at  equal  dis- 
tances from  the  base  and  apex.  Elytra  at  base  much  narrower  than  the 
head;  sides  moderately  divergent  posteriorly,  very  slightly  lougc-  thnu  the 
width  at  bas(?,  very  feebly  arcuate  ;  together  broadly  and  feebly  emarginate 
behind;  suture  just  perceptibly  shorten'  than  the  pi-onotum  ;  surface  rather 
ilepressed,  very  feebly  and  narrowly  impressed  on  the  suture,  rather  coarsely 
and  closely  punctate,  j)unctures  fre(iuently  coalescent  near  tiie  middle  of  the 
elytra,  interspaces  polished,  minutely  reticulated.  Abdominal  segments 
decreasing  sub-uniformly  and  extremely  slowly  in  width,  first  three  nearly 
of  equal  width,  and  as  wide  as  the  contiguous  elytra  ;  surface  coarsely  and 
rather  closely  punctulate,  punctures  imi)i-<.^.>jed,  interspaces  polished  ;  trans- 
verse carinae  tricuspid,  middle  cusps  long  and  finely  acicular,  lateral  very 
rudimentary.  Legs  rather  slen<ler,  rufo-fuscous,  tips  of  femora  darker  ; 
first  joint  of  the  posterior  tarsi  three-fourths  longer  than  the  second,  second 
slightly  longer  than  the  third. 

Mall', — Fifth  ventral  segment  scarcely  modified  ;  sixth  broadly  truncate  at 
tip,  truncation  very  feebly  sinuate  throughout  nearly  its  whole  length  as  in 
Pellitl;  seventh  segment  rather  deeply  emarginate  at  tiji. 

Female. — Sixth  segment  very  evenly  rounded  behind,  somewhat  narrow. 

Length  2.8-3.0  mm. 

Grimsby,  Ontario,  1,  9;  Tyngsborough,  Massucbiisetts,  1,  %, 


2:!.  S.  diflicilis  n.  sp.  (Schwarz  MS.). — Form  slender.  Pubescence  ex- 
ceedingly fine  and  short,  setiform  ;  longer,  recumbent,  and  more  abundant 
at  the  tip  of  the  abdtmien,  cinereous.  Head  rather  large,  twice  as  wide  as 
long  ;  interocular  surfa(;e  nearly  fiat,  three  times  as  wide  as  the  eye,  equally 
trilobed  by  the  very  shallow,  longitudinal  sulcations  ;  intermediate  surface 
feebly  convex  ;  finely,  evenly,  and  somewhat  closely  punctured,  interspaces 
one-half  fis  wide  as  the  punctures  ;  ocular  lines  meeting  at  about  two  lengths 
in  advanc(^ ;  antennae  moderately  slender,  but  very  slightly  longer  than 
width  of  head,  piceous-brown,  basal  joint  nearly  black,  club  moderate  ;  third 
joint  one-half  as  long  again  as  the  fourth,  fourth  distinctly  shorter  than  the 
fifth,  eighth  short  and  sub-globular,  joints  of  dub  increasing  in  length,  last 
two  equal  in  width,  last  acuminate  at  tip  ;  maxillary  palpi  slender,  first  joint 


' .     I 


iBH 


42 


NORTH    AMERICAN 


palo  tcstacoons,  secoiul  and  tliird  darker,  testaceous.  Prothorax  widest 
before  tlie  middle,  where  it  is  tliree-fourtlis  as  wide  as  tlie  head,  and  one- 
sixtli  narrower  tliaii  long  ;  sides  thenee  moderately  convergent  i>osteriorly 
and  very  slightly  sinuate  ;  anterior  and  posterior  margins  eiiiial  in  length, 
the  former  more  arcuate  ;  surface  with  two  very  faint  tuherculations  on 
each  side,  e(|ni-distant  from  each  other  and  from  the  anterior  and  ]iosterior 
margins  ;  canalicnlation  rather  ohscun^  connnencing  at  tln^  middle  and  ex- 
tending almost  to  the  posterior  margin  ;  slightly  unevenly,  coarsely,  and 
vaiiolately  ]innctnred,  interspaces  uneijnal  in  width,  very  slightly  convex, 
jiolishi'd.  Elytra  at  hase  somewiiat  narrower  than  the  head  ;  sides  notably 
divergent  posteriorly,  evenly  and  feebly  arcuate,  slightly  longer  than  the 
width  at  base  ;  together  broadly  and  very  feebly  einarginate  posteriorly  ; 
suture  about  eq^ual  in  length  to  the  pronotum  ;  surface  rather  coarsely  and 
unevenly  punctured,  punctures  rather  deeply  impressed,  closer  and  more 
ooalescent  externally,  interspaces  near  the  suture  about  ones-half  as  wide  as 
the  punctures,  shining,  minutely  reticulated.  First  three  abdominal  seg- 
ments ('(lual  in  width  to  the  contiguous  elytra  ;  border  strong;  surface  shin- 
ing, rather  coarsely  puiU'tulate  anteriorly,  more;  closely  and  finely  so  ])Oste- 
riorly  ;  transverse  carinae  tricuspid,  cusps  all  very  rudimentary,  intervals 
nearly  straight.  Legs  rufo-j)iceous,  moderate ;  first  joint  of  posterior  tarsi 
one-half  as  long  again  as  the  second,  second  notably  longer  than  tin!  tliird, 
thinl  and  fourth  equal  in  length.  Under  surface  of  abdomen  dark  piceous, 
finely  and  closely  punctulate. 

Mull'. — Posterior  edge  of  fifth  ventral  segment  rather  feebly  emarginate  in 
the  middle,  emargination  indefinitely  terminated  laterally,  contiguous  sur- 
fac(>  very  feiddy  and  longitudinally  impressed  in  its  middle  third,  bonlers  of 
impr(>ssion  furnished  with  long,  recumbent,  piceous  setae  ;  sixth  segment 
broadly  sinuate  at  apex,  sinus  evenly  and  somewhat  acutely  rounded  at 
bottom,  and  about  three  times  as  wide  as  deep,  surface  of  segment  not  im- 
pressed ;  seventh  segment  broadly  and  very  fe(d)ly  emarginate  at  apex,  emar- 
gination almost  transverse,  terminating  laterally  in  two  strong,  posteriorly 
proji'cting  tcseth. 

Ffmile. — Sixth  segment  broadly  and  very  evenly  rounded  behind. 

Length  3.0  mm. 

IMiddlc  State.*,  1  ;  Massncliusctts,  1  ;  Grimsby,  Ontario,  ?>. 
Very  readily  distiiif!:iiished   by  tlie  I'ourtli  joint  of  the  antennae, 
which  is,  ratlier  anomalously,  shorter  than  th(>  fifth. 


24.  S.  Pettiti  n.  sp. — Form  slender.  I'ubescence  close,  rather  coarse, 
short,  sub-recumbiuit,  evnly  distriliuted,  cinereous,  with  a  slight  fulvous 
tinge  on  the  abdomen.  Head  robust,  not  twice  as  wide  as  long  ;  interocular 
surface  very  feebly  depressed,  twict!  as  wide  as  the  eye  ;  longitudinal  eleva- 
tion narrower  than  the  lateral  portions,  rather  feebly  and  evenly  convex, 
distinct ;  punctures  fine,  rounded,  not  coalescent,  evenly  distributed,  and 
very  close  ;  ocular  lines  meeting  at  slightly  more  than  one  length  in  advance  ; 
antennae  very  slightly  longer  than  the  width  of  head,  rather  robust,  piceous- 
brown,  basal  joint  black,  club  very  moderate  ;  third  joint  one-third  longer 
than  tlie  fourth,  joints  four,  five,  and  six  uniformly  and  rather  rapidly  de- 


COLEOPTEKA. 


4.1 


creasing  in  length,  six  anil  seven  eijiinl  in  length,  tlie  latter  nuich  niore 
robust,  eighth  slightly  shorter  than  the  seventh,  strongly  clnliberl,  jeiiits  of 
elnb  elongated,  nearly  i>f  eciual  width,  ninth  anil  tenth  e(|ual  in  len^'tli,  last 
slii,'litly  longer  ;  maxillary  palpi  long,  jiiceous-hrown,  basal  joint  llavate. 
Prothorax  robust,  arcuately  widening  to  a  point  slightly  in  advance  of  the 
middle,  where  it  is  about  as  wide  as  long  ;  sid(>s  nioderat(dy  convergent 
posteriorly  and  nearly  straight;  anterior  and  posterior  margins  ecjiial  in 
lengtli,  tlie  former  slightly  the  more  arci'ate  ;  surface  feebly  swolh^n  near 
the  basal  angles,  closely,  finely,  somewhat  confusedly  punctate;  canalieula- 
ti  )n  nearly  obsolete,  more  distinct  just  btdiiml  the  middh',  feebly  impressed. 
Elytra  at  base  as  wide  as  the  head  ;  sides  rather  strongly  divergent  poste- 
riorly, longer  than  the  width  at  base,  feebly  arcuate,  much  more  strongly  so 
toward  the  apices  ;  together  broadly,  somewhat  angularly  and  distinctly 
emarginate  behind  ;  suture  nearly  one-sixth  longer  than  the  pronotiim  ; 
surface  strongly  imjiressed  on  the  suture  toward  the  base  ;  rather  coarsely, 
very  closely,  and  sonunvhat  evenly  punctate,  intc^rspaces  acutely  convex  ami 
very  narrow.  Abdom'.  '  segments  d(!creasing  extremely  slowly  in  wi<lth, 
first  two  of  e(jual  width,  and  as  wide  as  the  contiguous  elytra  ;  surface 
coarsely,  sub-variolately,  very  closely  and  evenly  punutulate  ;  transverse 
carinae  tricuspid,  middle  cus])s  long  and  very  finely  acuminate,  lateral 
rather  rudimentary.  Legs  moderate  in  length,  rufo-fuscous,  tips  of  femora 
darker;  first  joint  of  posterior  tarsi  four-fifths  long(!r  than  the  second,  and 
longer  than  the  last,  second  distinctly  longer  than  the  third,  third  and  fourth 
sub-(!iiual. 

MiiIh. — Posterior  e<lge  of  fifth  ventral  segment  just  perceptibly  and  roundly 
emaiginate  in  its  middle  fourth,  contiguous  surface  very  feebly  flattened 
throughout;  sixth  seg^nei.t  truncate  at  apex,  truncation  very  feebly,  just 
visibly  and  very  broadly  sinuate. 

Ftimilc. — Sixth  segment  veiy  broadly  and  evenly  rounded  behind. 

Length  3.0-3.2  mm. 

Grimsby,  Oiitiirio,  1  ;  MicMU;  Stsites  (locality  not  given),  1. 

This  species,  altliotijili  resembling  dijficifis  somewliat  in  form,  is 
totally  distinct  in  the  character  of  the  sexual  modifications.  It  is 
dedicated  with  pleasure  to  Mr.  J.  Pettit,  of  Grimsby,  Ontario. 

The  parasite  is  small,  very  convex,  highly  polished,  twice  as  long 
as  wide,  regularly  oval,  and  slightly  longer  tlian  the  first  joint  of  the 
posterior  tarsi  ;  it  is  cinereous  in  color  ;  the  long  bristles  are  few  in 
number,  and  aggregated  at  the  end  nearest  a  very  distinct  transverse 
suture. 


25.  S.  scriipeiis  n.  sp. — Form  moderately  slender.  Pubescence  short, 
sub  recumbent,  rath(>r  sparse,  bright  fulvous  on  the  abdomen,  plumbeous  on 
the  remainder  of  the  dorsal  surface.  Head  large  and  robust,  twice  as  wide 
as  long;  interocular  surface  slightly  depressed,  twice  as  wide  as  the  eye; 
longitudinal  elevation  much  narrower  than  the  lateral  jiortions,  strongly 
and  somewhat  acutely  convex,  prominent,  sulcations  acute  and  prominent; 
punctures  small,  rounded,  very  closely  crowded  toward  the  eyes,  where  they 


44 


NOUTII    AMERICAN 


:i4 


1  '■ 


m  ill 


arc  extremely  coalcseont ;  ocular  linos  meeting  at  one  length  in  advance, 
almost  uniformly  eurvate ;  antennae  V(!ry  slightly  longc'r  than  the  width  of 
head,  slender,  ehih  distinct,  hasal  joint  black,  remainder  rather  pale  piceons- 
lirown  ;  third  joint  one-half  longer  thnn  the  fourth,  fourth  and  liftli  sul)- 
eqnal,  sixth  and  seventh  ocjual  in  length,  the  latter  slightly  more  robust, 
eighth  nearly  twice  as  long  as  wide,  joints  of  club  of  nearly  e(iual  length, 
last  two  almost  equal  ;  maxillary  palpi  long  and  very  slender,  j)alo  piceoiis- 
brown,  becoming  i)ale  piceo-testac(wiis  toward  tlie  l)ase.  Prothorax  arcuately 
and  gradually  increasing  in  width  to  the  middle,  where  it  is  scarcely  three- 
fourths  as  wide  as  the  head,  as  wid«  as  the  elytra  at  base,  and  nearly  one- 
fifth  narrower  than  long;  sides  thence  moderately  convergent  posteriorly 
and  vi'ry  strongly  sinuate;  anterior  and  posterior  margins  eijual  ii\  length, 
tlie  former  rather  strongly  arcuate,  the  latter  nearly  straight ;  surface  strongly 
and  longitudinally  tul)erculate  near  the  basal  angles,  and  very  feebly  so  near 
tlut  apical  angles  ;  central  portions  of  the  pronotum  nearly  Hat ;  punctures 
rather  fine,  variform,  extremely  closely  crowded  near  the  base  and  ajiex 
where;  they  are  confused  and  coah^scent,  occasionally  isolated  ncsar  the 
middle  ;  interspaces  generally  acute  and  polished  ;  canalicuhition  beginning 
sliglitly  before  the  middle,  one-third  as  long  as  the  pronotum,  narrow,  well- 
marked.  Elytra  at  base  much  narrower  than  the  heail ;  sides  strongly 
diverg(!nt  jiosteriorly,  very  slightly  longer  than  the  width  at  base,  ratlier 
feebly  and  eveidy  arcuate  ;  together  very  broadly,  roundly,  and  strongly 
emarginate  behind;  suture  distinctly  shorter  than  the  pronotum;  surface 
depressed,  nearly  Hat,  very  feebly  impressed  on  the  suture  near  the  base, 
deeply,  rather  coarsely,  extremely  closely  punctate  ;  punctures  very  much 
confused,  interspaces  acute.  Abdominal  segments  uniforndy  and  very 
gradually  decreasing  in  width,  first  just  perceptibly  narrower  than  the  con- 
tiguous elytra  ;  surface  rather  coarsely  punctulate,  punctures  vory  close  near 
the  borders,  finer  and  more  distant  along  the  middle  and  also  behind  ;  trans- 
verse carinae  tricuspid,  middle  cusps  long  and  aciculate,  lateral  very  short 
and  somewhat  rudimentary.  Legs  long  and  slender,  pale  piceo-fuscous 
above,  paler  piceous-brown  beneath  ;  first  joint  of  the  posterior  tarsi  rather 
more  than  twice  as  long  as  the  second,  and  nearly  one-half  longer  than  the 
last,  second  joint  slightly  longer  thjvii  the  third,  fourth  much  shorter. 

Male. — Fourth  ventral  segment  very  feebly  impressed  throughout  its  middle 
third,  edge  entire;  fifth  emarginate  in  its  middle  third  at  apex,  emarginatiou 
evenly  rounded,  six  times  as  wide  as  deep,  contiguous  surface  rathe:'  strongly 
and  cylindrically  impressed  throughout  anteriorly  ;  sixth  segment  triangu- 
larly incised  at  the  apex,  incisure  one-third  as  wide  as  the  apex,  very  slightly 
wider  than  deep,  edges  of  notch  rapidly  thinned,  so  that  it  is  bordered  by  a 
narrow,  concave  surface;  seventh  segment  transversely  truncate  at  tip. 

Female. — Sixth  segment  angularly  produced  and  rounded  behind. 

Length  3.2-3.7  ram. 

Grimsby,  Ontario,  8  ;  Maniuette,  Lake  Superior,  1. 

A  very  distinct  species  in  form,  sculpture,  and  sexual  modifications. 


26.  S«  illtrilSUS  n.  sp. — Form  moderately  robust.    Pubescence  very  short, 
setiform,  sparse,  very  flue  and  cinereous,  becoming  llavo-ciuereous  toward 


COLEOPTERA. 


45 


till'  tip  of  the  .abiloitii'ii.  Head  large,  twico  as  wide  aa  long;  iiiterocular 
surfftct!  very  inodcratiOy  oxcavatod,  twicti  as  wide  as  tlio  nyc,  somewhat 
coai'stdy,  cldstdy,  aixl  evenly  puiiL'tured  ;  punetiiri'S  imiiressed,  interspaces 
IKilislied;  e(|ually  trilobcfd  by  the  distinct  longitudinal  sulcations,  between 
wlii(di  the  surface  is  evenly  convex  ;  ocular  lines  meeting  at  one  length  in 
advance  ;  antennae  very  slender,  longer  than  the  width  of  head,  first  two 
joints  black,  remainder  piceoiis-brown,  club  slender;  third  joint  one-third  as 
long  again  as  the  fourth,  fourth  and  fifth  ecjual  in  length,  sixth  and  seventh 
(■(luai,  joints  of  cdui)  increasing  in  length  ;  maxillary  palpi  very  slender,  first 
joint  jiale  testaceous,  next  two  darker  testact^ous.  Prothorax  robust,  widest 
at  the  middle,  where  it  is  threci-fourths  as  wide  as  the  head,  and  about  as 
wide  as  long  ;  sides  thence  moderately  convergent  posteriorly,  and  distinctly 
sinuate  ;  anterior  and  posterior  margins  equal  in  length,  the  former  slightly 
the  more  arcuate;  surface  transversely  impressed  just  behind  the  anterior 
margin,  and  slightly  tuborculate  at  the  sides  near  the  base  ;  somewhat  finely 
punctured,  punctun-s  rounded,  impressed,  and  seldom  coalescing,  inter- 
spaces one-half  tiieir  width,  highly  polished  ;  canaliculation  in  the  foim  of 
a  slight  longituilinal  impression,  extending  along  the  middle  three-fifths, 
and  scarcely  noticeable.  Elytra  at  base  as  wide  as  the  head  ;  sides  very 
moderatidy  divergent  posteriorly,  but  slightly  longer  than  the  width  at  base 
and  almost  straight ;  together  broadly  and  somewhat  feebly  emarginate 
posteriorly  ;  suture  one-sixth  as  long  again  as  the  pronotum  ;  surfa(;e  nearly 
evenly  convex,  punctures  rather  coarse,  deeply  impressed,  rounded,  and  but 
seldom  coalescing,  intca'spaces  one-half  their  wiiltli  and  highly  polished. 
Abdominal  segments  decreasing  regularly  and  moderately  in  width  poste- 
riorly, first  as  wide  as  the  contiguous  elytra  ;  surface  rather  depressed,  highly 
l)olished,  sparsely,  very  finely  punctulate  ;  transverse  carinae  tricuspid, 
middle  cusps  long  and  acicular,  lateral  short,  exjianding  at  apex,  and 
inclined  inward,  intervals  very  moderately  sinuate.  Legs  slender,  dark 
piceous  ;  tarsi  paler,  slender  ;  first  joint  of  posterior  twice  as  long  as  the 
second,  next  three  uniformly  decreasing  in  length.  Under  surface  of  abdo- 
men clothed  with  long,  recumbent,  fusco-flavate  pubescence  which  is  very 
fine. 

Male. — Posterior  edge  of  the  fifth  ventral  segment  strongly  emarginate  in 
its  middle  half,  emargination  evenly  rounding,  six  times  as  wide  as  deep, 
surface  deeply  impressed,  sides  of  impression  slightly  convergent  anteriorly, 
and  in  the  form  of  acute  ridges  which  terminate  posteriorly  in  acute  teeth, 
projecting  over  and  beyond  the  emargination,  fioor  of  impression  fiat  and 
almost  impunctate  ;  sixth  segment  very  narrowly,  deej)ly,  and  triangularly 
incised,  at  apex,  notch  much  deeper  than  wide,  angle  very  acute,  sides 
straight ;  seventh  segment  deeply  emarginate  at  apex. 

Female. — Sixth  segment  feebly  bilobed  at  apex,  cusp  acute,  arms  widely 
divergent. 

Length  3.7-4.0  mm. 

Cambridge,  Massiicliusetts,  28 ;  Wliite  Fish  Point,  Michigan,  1  ; 
Escanaba,  Michigan,  1  ;  Canada,  1. 

A  fine,  well-marked  species,  with  excellent  sexual  cliaracters.    The 


-  Jl 


46 


NORTH    AMKRICAN 


moilificutioii  of  the  sixth  SL-gmtMit  in  tlie  ruinale  is  not  noticeable;  in 
some  SfH-'ciinens. 

27.   H,  crytlll'opilH  'S\t'\». — Fdiin  inoileratoly  rolinst.     PulH'SCcnce  ox- 

t't;L'(liii;;ly  slioi't  ;iii(l  spar.sc,  tine,  ^ctil'onii,  and  cincrcniis.  Head  robust,  not 
twice  art  wide  as  long  ;  intfi'ocular  surface!  twicu  a.-i  wide  as  tin?  cy*',  distinctly 
excavated,  rather  coarsely,  closely,  and  evenly  innictate,  interspaces  one- 
fonrtli  as  wide  as  tlie  jiiinctnri's,  shining  ;  (equally  trilobed  by  the  sharply 
marked,  longitudinal  sulcations,  intermediate  surface  evenly  cons-ex  ;  ocular 
lines  meeting  at  one  length  in  advance ;  nnteiinai'  long  and  very  slender, 
longer  than  width  of  heail,  ilark  piceeuis-brown,  basal  joint  black,  club 
narrow  ;  third  joint  one-thir<l  as  long  again  as  the  fourth,  fourth  and  lifth 
equal,  eighth  longer  than  tin?  ninth,  joints  of  club  slender,  equal  in  length, 
ninth  and  ♦enth  clavate,  last  c(<nical ;  maxillary  palpi  long  and  slender,  pale 
fusco-tcstac 'ous  throughout.  Prothorax  very  robust,  wiclest  at  the  middle, 
where  it  is  ihree-fourths  as  wide  as  the  head,  and  slightly  narrower  than 
long  ;  sides  timnce  very  feebly  convergent  posteriorly,  and  distinctly  sinuate  ; 
anterior  ard  jiosterior  margins  equal  in  length,  the  former  much  the  more 
arcuate;  surface  rather  unevenly  convex,  very  closely,  somewhat  coarsely 
and  unevenly  punctate  ;  canaliculation  somewhat  obscure,  narrow,  but  dis- 
tinct, commencing  at  the  middle  and  extending  to  within  one-fourth  the  total 
length  of  the  posterior  margin.  Elytra  at  base  much  narrower  than  the 
head,  sides  moderately  divergent  posteriorly  and  feidily  arcuate;  together 
broadly  and  very  feebly  emarginate  posteriorly;  suture  slightly  longer  than 
the  pronotum  ;  surface  depressed,  coarsely,  deeply,  and  very  unevenly 
sculptured,  on  a  small  area  near  the  inner  basal  artgles,  the  i)unctnres  are 
rounded  and  isolated,  with  the  interspaces  much  wider  than  the  punctures, 
the  remainder  of  the  surface  is  very  closely  and  deviously  channeled,  the 
channels  being  generally  short.  Abdominal  segments  decreasing  very  gradu- 
ally in  width,  first  narrower  than  the  contiguous  elytra;  surface  convex, 
coarsely  and  closely  punctulate  anteriorly,  finely  so  posteriorly;  transverse 
carinae  tricuspid,  middle  cusps  slender  and  acicuiate,  lateral  rndinuMitary 
and  expanding  at  apex,  intervals  rather  strongly  sinuate;.  Legs  long  and 
slender,  pale  piceous-brown  ;  first  joint  of  posterior  tarsi  more  than  twice  as 
long  as  the  second,  longer  than  the  next  three  together,  second  distinctly 
longer  than  the  third. 

Molt'. — Posterior  edge  of  fifth  ventral  segment  strongly  emarginate  in  its 
middle  three-fifths,  contiguous  surface  deeply  impressed,  floor  of  impression 
flat,  somcnvhat  uneven,  in)punctate  ;  sides  nearly  parallel,  in  the  form  of 
acute,  elevated  ridges,  which  terminate  posteriorly  in  two  strong  acute  teeth 
projecting  over  and  beyond  the  emargination  ;  sixth  segment  narrowly  emar- 
ginate at  the  apex,  notch  much  deeper  than  wide,  rounded  anteriorly,  sides 
nearly  straight,  surface  unevenly  and  feebly  impressed,  and  impunctate  ;  at 
the  anterior  portion  of  the  impunctate  area,  there  is  an  elongated,  narrow, 
and  very  acute  cariniform  elevation,  rising  abruptly  from  the  surface  ;  seventh 
segment  narrow,  evenly  emarginate  at  apex. 

Female, — Sixth  segment  acutely  rounded  posteriorly  and  distinctly  bilobed 
•  at  the  apex,  cusp  minute  and  rounded,  arms  widely  divergent. 

Length  4.0-4.8  mm. 


COLEOPTKRA. 


47 


Ciinibridgc,  Massju'liusetts,  7;  Wliitc  Firsli  Point,  INIicliifran,  1. 
Tliis  very  fine  species  is,  witli  a  few  exceptions,  tiie  most  distinct 
in  its  sexual  diameters  of  any  in  llie  genus. 


28.  S.  rilKifcr  li.  sp.  (Fauvnl  MS.). — Form  robust.  PiiLesfencH  oxces- 
sivc'ly  sluirt,  sub-i'rcct,  ratlior  (.'oarHc,  siiar.sc,  vi'ry  jialc  llavd-cincrcoiis.  Head 
small,  iiil)iisi,  scarcely  tuico  as  widi-  as  long  ;  iutfrocular  siii  face  iit-arly  Hat, 
sliglitly  more  than  twice  as  wide  as  tli.s  vyv,  nearly  ecjually  trilobcd  by  the 
(Ict'H,  ac\itt'ly  roundi'd  siilcations  ;  intermediate  surface  stronjrly  and  evenly 
convex  ;  juinctiires  moderately  coarse,  deep,  so  closely  crowded  as  to  jiresent 
simply  an  extremely  rough  surface,  totally  lustreless  ;  ocular  lines  meeting 
atone  length  in  advance;  antennae^  very  slightly  longer  than  the  width  of 
bead,  robust,  piceous-black,  club  distinct ;  third  joint  one-half  as  long  again 
as  the  fourth,  fourth  and  fifth  e(jual,  sixtli  slightly  longer  and  niucli  less 
robust  than  the  seventh,  eighth  globular,  as  thick  as  the  seventh,  joints  ten 
and  eleven  nearly  (^qual  in  lengtli,  distinctly  longer  than  tlie  ninth  ;  maxil- 
lary jialpi  very  long,  piceous-black,  clou<led  slightly  darker  toward  tlie  tip. 
Prothorax  arcuately  and  evenly  increasing  in  width  to  a  point  slightly  bidiind 
the  middle,  wliore  it  is  very  slightly  narrower  than  the  head,  and  nearly 
one-sixth  narrower  than  long  ;  sides  thence  nuxlerately  convergent  posteriorly 
and  strongly  sinuate  ;  antc^rior  margin  rather  strongly  arcuate,  posterior 
straight ;  surface  longitudinally  tuberculate  along  the  tlanks  of  the  pronotum, 
jiarticularly  near  the  basal  angles,  transvcirsely  impressed  imnu'diately  be- 
hind the  anterior  margin,  longitudinally  canaliculated  through  the  middle 
two-thirds,  border  of  furrow  sliglitly  swollen,  entire  surface  rather  linely, 
deeply,  and  excessively  closely  sculptured,  rough,  and  lustrtless.  Elytra 
at  base  mnch  wider  than  the  head  ;  sides  nearly  parallel,  slightly  longer 
than  the  width  at  base  and  very  feebly  arcuate,  more  so  behind;  together 
broadly,  roundly,  and  distinctly  emarginate  behind  ;  suture  slightly  more 
than  one-fourth  as  long  again  as  the  pronotum ;  surface  of  each  elytron 
slightly  swollen  near  the  middle  of  the  base,  finely,  excessively  elosely, 
and  irregularly  punctured  and  channeled,  lustreless.  Abdominal  segnunits 
decreasing  uniformly  and  very  gradually  in  width,  first  just  percejjtibly 
narrower  than  tlu;  contiguous  elytra;  surface  nearly  lustreless  ;  jiunctures 
extremely  close,  very  coarse,  polygonally  compressed,  slightly  finer  and 
more  isolated  toward  the  tip  ;  transverse  carinae  tricuspid,  middle  cusps 
long  and  acicular,  lateral  equal  in  length,  broad,  widening  at  tip,  where 
they  are  amalgamated  with  the  general  surface.  Legs  sbtnder,  iiiceous- 
black  ;  first  joint  of  the  posterior  tarsi  three-fourths  as  long  again  as  the 
second,  anil  equal  in  length  to  the  last,  second  much  longer  than  the  third, 
third  and  fourth  sub-eciual. 

Mdk. — Fourth  ventral  segment  feebly  flattened  in  the  middle  at  apex  ;  fifth 
segment  emarginate  in  its  middle  third  at  ap»!X,  emargination  evcndy  rounded, 
twelve  times  as  wide  as  deep,  contiguous  surface  impressed  through  one-half 
its  length  anteriorly,  sides  of  impr(!SS(id  area  acutely  ridged,  coarsely  setose, 
and  terminating  posteriorly  in  well-markinl  acute  teeth,  bottom  of  impression 
nearly  Hat  and  impunctate  toward  the  emargination  ;  sixth  segment  triangu- 


48 


NOHTII    AMKKICAN 


larly  iiiciHod  at  a\>ox,  trinn^;lt'  iMiuilatcral,  Hiiylitly  inon!  than  oiif-tliinl  an 
wide  as  thti  Ht-gTiiciit, 

Fiiiifilr, — Sixth  scf^incnt  iiarrowly  inndiii'tMl  and  l)itii)M>d  at  tlin  apex,  ciiMj) 
small,  distinct,  vtry  fctdily  rounded,  ann.s  narrowly  divfrj^cnt  and  ratln-r 
acHtwly  rounded. 

Length  %  3.5,  9  4.2  mm. 

Aliiniosii,  Colonido,  2. 

Eiisily  riH;()<iMiz('(l  by  its  very  rongli,  lustfeless  surface,  and  v(M'y 
distinct  sexual  clumictcrs. 


l!l' 


il- 


ii'.l.  S.  aiiastolllOZan»  n.  sp.  (Crotch  MS.). — Form  very  moderately 
robuHt.  I'libesct^nce  short,  rather  close,  coarse,  semi-enfct,  cintTuous.  Head 
rather  small,  more  than  twice  a.s  wide  as  long;  interocular  surface  nearly 
tlat,  two  and  one-half  times  as  wide  as  the  eye  ;  loiigitndinal  (devation 
slij,'htly  narrower  than  tiie  lateral  jjortions,  stron^dy  and  evenly  convex  ; 
Bulcatiuns  sonuiwhat  deep  and  prondnent ;  punctures  coarse,  rounded, 
moderately  close,  evenly  distrilmteil,  and  deeply  impresseil,  intersi)aces  one- 
half  as  wide  as  the  punctures,  feebly  convex,  and  shininj;  ;  ocular  lines 
meetiaig  at  one  length  in  advance  ;  antennae  as  long  as  the  width  of  head, 
rather  slender,  club  large,  basal  joint  black,  remainder  dark  piceous-brown  ; 
third  joint  one-half  as  long  again  as  the  fourth,  fourth  sliglitly  longer  than 
the  lifth,  sixth  slightly  longer  and  much  less  robust  than  the  seventh,  eighth 
very  robust,  as  wide  as  or  slightly  wider  than  the  seventh,  tenth  joint  slightly 
the  widest ;  maxillary  pali)i  long  an<l  slender,  dark  piceous-brown,  becoming 
pale  piceo-teslaceous  at  the  base,  fourth  joint  very  distinct.  Prothorax 
almost  uniformly  and  gradually  increasing  in  width  to  the  middh?,  where  it 
is  four-fdtlis  as  wide  as  the  head,  and  distinctly  narrower  than  long;  sides 
thence  moderattdy  conv(!rgent  posteriorly  and  very  feebly  sinuate;  anterior 
and  posterior  margins  equal  in  length,  the  former  distinctly  the  more  arcuate  ; 
surtace  Hnely  tuberculate  along  the  sides  near  the  canaliculation,  and  more 
particularly  near  the  basal  angles  ;  rather  finely,  deeply,  extremely  clostdy, 
and  somewhat  confusedly  punctured,  interspaces  acute  ;  canaliculation  short, 
moderately  deep,  and  narrow,  commencing  just  before  the  middle,  one-fourth 
as  long  as  the  pronotum.  Elytra  at  base  as  wide  as  or  just  perceptibly 
wider  than  the  head  :  sides  very  feebly  divergent  posteriorly,  slightly  longer 
than  the  width  at  base,  rather  strongly  and  evenly  arcuate ;  together  nar- 
rowly and  very  strongly  emarginate  behind  ;  suture  nearly  one-third  as  long 
again  as  the  pronotum  ;  surtace  very  feebly  and  broadly  impressed  on  the 
suture  at  and  near  the  base,  somewhat  coarsely,  very  deeply,  extremely 
closely  punctate  and  channeled,  interspaces  acute.  Abdominal  segments 
decreasing  uniformly  and  rapidly  in  width,  first  distinctly  narrower  than 
the  contiguous  (dytra  ;  surface  rather  strongly  convex,  extremely  coarsely 
and  closely,  sub-variolately  punctulate ;  punctures  rounded  and  not  coales- 
cent,  much  finer  and  more  distant  behind;  transverse  carinae  tricuspid, 
cusps  very  long,  stout,  aciculate  at  tips,  prominent,  lateral  slightly  shorter 
than  the  middle  ones.  Legs  rather  long  and  slenier,  femora  black,  tibiae 
and  tarsi  pioeous-black  beneath  ;   first  joint  of  posterior  tarsi  three-fourths  as 


.  V  V 


'  I    -,, 


COI.KOl'TEHA. 


49 


thinl  as* 

ex,  cnsi> 
.1  rathi-r 


11(1  very 


odcratcly 
iH.    Head 
ce  nearly 
i^leviition 
'  convex  ; 
I'ouiideil, 
liU'Crt  one- 
ular  liiifs 
li  of  lu-ad, 
US-brown  ; 
)ngt'r  than 
ilh,  ei^'hth 
nt  slightly 
,  hi'i.'oniing 
Prothorax 
(•,  where  it 
ong ;  sides 
> ;  anterior 
I'e  arcuate ; 
,  and  more 
jly  closely, 
Uion  short, 
line-fourth 
l)erceptibly 
htly  longer 
Tether  nar- 
lird  as  long 
;sed  on  the 
extremely 
il  segments 
rower  than 
ily  coarsely 
not  coales- 
8  tricuspid, 
htly  shorter 
)lack,  tibiae 
le-fourths  as 


long  again  an  tlio  8t*cnnd,  anil  very  slightly  Hliortor  than  the  last,  Hwond 
distinctly  longer  than  the  third,  third  and  fourth  suli-ecjual  in  length. 

Mnli. — Fourth  ventral  segment  having  a  small,  triangular,  impunctate 
spot  at  the  middle  of  the  apex  ;  fifth  segment  emarginate  in  its  middle  three- 
flftliH  at  apex,  emargination  evenly  nniuded,  and  eight  to  ten  times  as  wido 
as  deep,  contiguous  surface  impressiMl  nearly  throughout  anteriorly,  >.i<les  of 
impression  slightly  convergent,  acutely  ridged,  and  furnished  with  very 
long,  coarse  setae,  bottom  of  impressed  sni'face  impunctate;  sixth  segment 
triangularly  incised  at  apex,  inc-isiou  one-third  as  wide  as  the  segmental 
apex,  as  wide  as  deep  ;  seventh  segnu'Ut  deej)ly  and  roundly  emarginate  at 
tip,  teeth  distinct,  lateral  setae  very  long. 

/•(■;;»(/('. — Sixth  segment  hilobed  at  apex,  cusp  minute  and  very  broadly 
rounded. 

Length  3. 7-;}. 8  mm. 

Hermit  Lake,  Mount  Wasliington,  N.  II.,  1  %,;  Mount  "Wasliing- 
ton,  N.  II.  (valleys),  1  ?. 

This  fine  species  greatly  resenibles  rugifer,  but  diflfers  in  its  more 
slender  form,  and  especially  in  its  miicli  more  slender  abdomen.  It 
also  ditlers  markedly  in  tlie  nature  of  tlie  punctuation  of  tlie  liead 
and  abdomen.  In  tlie  ty[)e  specimen  the  fourth  joint  of  tiie  maxillary 
palpi  is  plainly  visible,  ai)pearing  as  a  stiff  and  regularly  ta|)ering 
spine,  protruding  from  the  apex  of  the  third  joint.  The  small  im- 
punctate triangle  of  the  fourth  ventral  segment  may  possibly  be 
abnornuil. 

30.  S.  slioslioilis  n.  sp. — Form  moderately  robust,  sides  parallel. 
Pubescence  mod'-rate  in  length,  rather  sparse,  semi-erect,  fine,  setiform, 
jiale  fulvo-piceous.  Head  moderate,  very  robust,  not  twice  as  wide  as  long  ; 
interocular  surface  slightly  more  tliau  twice  as  wido  as  the  eyct,  flat,  equally 
trilobed  by  the  very  deep,  rounded  sulcations  ;  intermediate  surface  evenly, 
broadly,  and  strongly  convex  ;  punctures  fine,  rounded,  very  close,  and  often 
coalesceiit.  Interspaces  nearly  opaque  ;  ocular  lines  meeting  at  less  than  one 
length  in  advance;  antennae  as  long  as  the  width  of  head,  slender,  dark 
piceous-brown,  club  distinct  ;  third  joint  one-third  as  long  again  as  the 
fourtli,  fourth  and  fifth  equal,  sixth  very  slightly  longer  than  the  seventh, 
eightli  twice  as  long  as  wide,  seventh  and  eighth  just  perceptibly  more 
robust  than  the  sixth,  joints  of  club  increasing  gradually  in  length  and 
breadth  :  labial  pal})!  very  robust,  piceous-black,  basal  joint  pale  piceo-testa- 
ceous  ;  nientum  bearing  several  very  long  setae.  Prothorax  very  robust, 
widest  slightly  in  advance  of  the  middle,  where  it  is  just  perceptibly  nar- 
rower than  the  head,  very  slightly  broader  than  long,  and  as  wide  as  the 
elytra  at  base  ;  sides  thence  rather  rapidly  convergent  posteriorly  and  very 
feebly  sinuate  ;  anterior  margin  slightly  longer  and  more  arcuate  than  the 
posterior ;  surface  feebly  impressed  along  the  flanks  of  the  pronotum,  and 
transversely  and  rather  strongly  impressed  just  behind  the  anterior  margin  ; 
very  closely,  finely,  and  deeply  punctured  ;  Canaliculation  rather  deeply  ex- 
Stbnini.  4 


60 


NORTH    AMKUICAN 


M 


cavftted,  t'xtt^iuling  with  nearly  equal  nicltli  to  within  very  xliort  (li.staiioeH 
of  till-  l)(iMc  anil  apex,  liottimi  inipiinclatc.  Elytra  at  base  very  slightly 
narrower  than  tlie  head  ;  Hiilex  very  Htr(inj,ly  divergent  ])o»teriorly,  very 
HligUtly  longer  tlian  the  width  nt  bast),  rather  strongly  and  evenly  nrcnato  ; 
together  very  broadly,  evenly,  and  Htrongly  eniarginate  behind  ;  siitiiro 
slightly  rtborter  than  the  jironotiini  ;  surface  dejiresseil,  even ;  very  dee|p|y, 
rather  llnely,  very  uloHely  and  unevenly  punctate  and  ehanneled,  interspaees 
very  narrow,  eonvex,  and  shining.  First  two  abdominal  segments  eiiu.'il  in 
width,  slightly  wider  than  the  contiguous  elytra  ;  surlace  broadly  and  rather 
feebly  convex  ;  coarsely,  closely,  nn<l  rather  feebly  puiictulate  ;  transverse 
carinao  tricuspid,  nudiUe  cuhjjs  very  strong,  finely  acuminate  at  tip,  lateral 
large,  dilfused,  and  exceeilingly  indefinite,  Legs  moderate,  piceous-black 
above,  dark  rufo-piceou  beneath  ;  first  joint  of  posterior  tarsi  one-half  as 
long  again  as  the  second. 

Milk; — Unknown. 

FiiiKili-. — Sixth  ventral  segment  angularly  produced  at  apex,  vertex  very 
fe(d)ly  rounded. 

Length  3.G  mm. 

Tliurston  County,  "NVasliington  Territory,  1. 

The  robust  prothorax  unil  short  elytra  will  readily  distinnjiiisli  this 
very  well-marked  species.  The  maxillary  \)ii\\n  are  lacking  in  the 
type  specimen. 


•m 


31.  S.  ilisillaris  n.  sp. — Form  slender.  I'nbescpnce  rather  long,  fine, 
and  somewhat  sparse,  recumbent,  rather  pale  fusco-cinereous.  Head  large, 
more  than  twice  as  wide  aa  long ;  interocular  surface  nearly  twice  aa  wide  as 
the  eye,  rather  strongly  depresstMl  ;  longitudinal  elevatiim  narrower  than 
the  lateral  portions,  evenly  and  very  strongly  ''onvex,  very  prominent  ; 
punctures  fine,  close,  and  even  at  the  sides,  very  minute  and  sparse  in  the 
middle;  ocular  lines  meeting  at  one  length  in  advance;  antennae  slightly 
longer  than  the  width  of  head,  slender,  piceous-brown,  growing  slightly 
paler  toward  tip,  club  rather  small ;  third  joint  one-fourth  as  long  again  as 
the  fourth,  fourth  slightly  longer  than  the  fifth,  seventh  slightly  shorter  and 
more  robust  than  the  sixth,  eighth  rval,  joints  of  club  increasing  very  gradu- 
ally in  length  and  thickness  ;  m  palpi  long,  first  joint  pale  testa- 
ceous, second  darker,  rufo-test.*'  d  very  long,  dark  piceous-brown. 
Prothorax  widest  distinctly  middle,  where  it  is  three-fourths  i'.s 
wide  aa  the  head  and  just  ly  narrower  than  long  ;  sides  thence  very 
slightly  convergent  postei.  ./id  rather  strongly  sinuate;  anterior  margin 
slightly  shorter  and  much  more  arcuate  than  the  posterior ;  surface  rather 
strongly  tuberculate  at  the  aides  .near  the  base,  finely  and  irregularly 
punctate;  tumctures  very  feeble,  isolated  in  the  middle,  crowded  toward  the 
margins,  uiterspaces  flat  and  highly  polished  ;  canaliculation  short,  oval, 
deeply  impressed,  beginning  slightly  before  the  middle,  scarcely  more  than 
one-fourtli  as  long  aa  the  pronotum.  Elytra  at  base  slightly  narrower  than 
the  head ;  sides  moderately  or  somewhat  strongly  divergent  posteriorly,  very 
slightly  longer  than  the  width  at  base,  feebly  arcuate ;  together  just  percep- 


COI.EOl'TFHA. 


Ol 


tilily  mill  riMimlly  ctnnrKniatc  Im-ImikI  ;  r^iitiirt-  aliniit  (•(pml  in  liMij,'tli  to  tlie 
jiroiidtimi  ;  siii  I'lU'c  iiitlnT  (IcpivsMcil,  i-iu-li  liiivinn  a  «lij,'lit  t'lcviitioii  lit  tin* 
luiililli'of  itH  liiiHi' ;  cdiirHcly,  siil(-v;ii'i(il;iti'ly,  closcl/,  iind  vcvy  iri<'j;iiliii'ly 
|iiiiii;tiirf<l  iind  cliiiiiiK'li'il.  Abdominal  Hi'f,'ui''MtH  tl(■^•|•<■ll^:^nJ;  iiiiit'oriiily  iiinl 
Very  fjrftdiially  in  wiiitli,  first  alHxit  ax  wiiii-  as  tlic  coiitiKiious  elytra  ;  siirlacn 
nmilcrati'ly  convex,  Ihiely  nnil  feelily  pnix-tiilate  ;  transversie  earinae  iini- 
eus|ii<l,  cusp  long  ami  acioulate.  Lege  rather  long  and  slender,  t'uscoiis, 
under  sides  of  femora  rufous  ;  llrst  joint  Oi"  posterior  tftral  very  short,  one- 
halt'  as  ioiif^  af,'aiu  as  tiie  second,  one-lnilf  as  lonj^  as  tin-  last  ;  joints  Inn  to 
four  uniformly  and  gradually  decreasing  in  length,  together  not  as  long  as 
the  Ofih.     Uody  winged. 

Mtilr, — Fourth  ventral  segment  slightly  flattened  in  its  middle  three-fltths, 
more  strongly  so  hehind,  edge  scarcely  niodilii'd  ;  lifth  segment  deeply  eniai- 
ginato  in  its  middle  throe-llfths  at  ajiex,  emargination  very  eveidy  rounded, 
from  six  to  seven  times  as  wide  as  deep,  contiguous  surface  rather  strongly 
and  cylindrically  impressed  throughout  anteriorly,  the  borders  of  all  tliH 
impressed  and  llattc-nt^il  surfaces  being  hoi'dered  with  long,  recumlient,  pice- 
ous  setae;  sixth  segment  narrowly  sinuate  at  ajiex,  sinus  one-half  as  wide 
as  the  apices,  nearly  as  deej)  as  wide,  acutely  rounded  at  the  bottom,  sides 
nearly  straight,  exterior  angles  rather  acute. 

Female. — Sixth  segment  broadly  and  very  evenly  rounde<l  behind. 

Length  4.0-4.2  mm. 

Vancouver  Island,  British  Columbia,  5. 

Hesenibles  at  first  sight  a  diniinutivo  inarttimns,  but  is  quite  dis- 
tinct, as  may  be  interred  Irom  the  descriptions. 


32.  8>  vexatlis  n.  sp. — Form  moderattdy  slender.  Pubescence  mod«'. 
rat(dy  long,  semi-erect,  somewhat  close,  pale  picieoiis  anteriorly,  llavate  on  the 
abdomen.  Head  rather  large,  twice  as  wide  as  long;  interocular  surface 
slightly  more  than  twic'e  as  wide  as  the  eye,  moderately  depressed,  finely  and 
somewhat  irregularly  punctured,  interspaces  in  some  spots  as  wide  as  or 
wider  than  the  punctures,  flat,  and  shining;  equally  trilobed  by  the  very 
deep  and  conspicuous  snlcations  ;  intermediate  surface  strongly  and  evenly 
convex  ;  ocular  lines  nictating  at  two  lengths  in  a<lvance  ;  anttmnae  piceoiis- 
black,  very  slightly  longer  than  the  width  of  head,  slender,  club  not  con- 
spicuous ;  third  joint  scarcely  one-flfth  as  long  .again  as  the  fourth,  joints 
four  to  six  uniformly  decreasing  in  length,  sixth  and  seventh  eij^ual  in 
length,  the  latter  thicker,  eighth  elongated,  as  wide  as  the  seventh,  joints  of 
club  increasing  in  length,  the  last  two  equal  in  thickness  and  stouter  than 
the  nii\th  ;  first  joint  of  maxillary  palpi  and  base  of  the  second  translucent, 
pale  testaceous,  remainder  piceous-black.  Prothorax  widest  a  little  before 
the  middle,  where  it  is  four-fifths  as  wide  as  the  head,  and  about  as  wide  as 
long  ;  sides  thence  moderately  convergent  posteriorly  and  slightly  sinuate  ; 
anterior  margin  slightly  shorter  and  much  more  arcuate  than  the  posterior  : 
surface  distinctly  bi-tuberculate  at  the  sides,  very  irregularly  and  rather 
finely  punctate;  ^amctures  in  the  middle  very  small  and  distant,  crowded 
and  larger  at  the  ends  ;   canaliculation  very  conspicuous,  short,  narrowly 


"W 


52 


NORTH    AMEKICAN 


::;!, 


4 


oval,  very  dtjeply  impressed,  beginning  slightly  before  the  middle,  two-fiftlis 
as  lon<;  a^^  the  pronotiun.  Elytra  at  ba»i'  diHtinctly  narrower  than  the  head  ; 
sides  rather  Htrongly  divergent  })osteri(>rly  and  very  feebly  areuate,  slightly 
longer  than  the  width  at  base;  together  broadly  and  feebly  eniarginate  be- 
hind ;  Huture  equal  in  length  to  the  pvonotuni ;  snrfaee  depressed,  coarsely, 
deeply,  and  very  irregularly  punctured  and  channeled.  Abdominal  segments 
decreasing  uniformly  and  extremely  gradually  in  width,  first  slightly  wider 
than  tiio  contiguous  elytra;  surface  rather  depressed,  very  finely,  closely, 
and  evenly  panctulate  ;  transverse  carinae  tricuspid,  middle  cusps  very 
long,  becoming  aciculate  toward  the  tips,  lateral  very  short  and  rudimen- 
tary, intervals  distinctly  sinuate.  Legs  short,  dark  rnfoj)iceou,s,  tarsi 
black  ;  lirst  joint  of  posterior  tarsi  twice  as  long  as  the  S'-cond,  and  as  long 
as  or  longer  than  the  last,  second  slightly  longer  than  the  third,  lifth  joint 
widest.  Under  surface  of  abdomen  clothed  w'  ^ong,  recumbent,  cinereous 
pubescence. 

J/ri/f. — Unknown. 

Female. — Sixth  ve>-tral  segment  very  evenly  rounded  behind. 

Length  3.1  mm. 

Thurston  County,  Washington  Territory,  1. 

Upon  the  above  type  of  this  very  well-marked  species  may  be  seen 
nine  large  parasites,  each  nearly  as  long  as  the  first  three  antenna! 
joints,  very  convex,  polished,  and  witli  ovfil  outline  ;  tliey  are  of  a 
pale  ferruginous  tint,  and  appear  to  be  comparatively  highly  organized. 


i     m] 


H 


33.  S.  Scllivarzi  n.  sp.  (Fanvel  MS.). — Form  rather  slender.  Pubes- 
cence sliort,  fine,  sparse,  semi-erect,  Havo-cinereoua,  not  conspicuous.  Head 
moderate,  robust,  scarcely  twice  as  wide  as  long  ;  eyes  large,  very  convex  ; 
interocu.ar  surface  very  moderately  excavated,  scarcely  twice  as  wide  as  the 
eye,  finely,  sub-variolately,  and  irregularly  punctate  ;  jiunctrres  rather  dis- 
tant bi'liind,  coalescent  anteriorly  ;  longitudinal  elevation  scarcely  more  than 
one-half  as  wide  as  the  lateral  portions,  rather  acutely  and  strongly  convex  ; 
ocular  lines  meeting  at  one  length  in  advance  ;  antennae  long,  slender,  much 
longer  than  the  width  of  head,  basal  joint  black,  remainder  dark  piceous- 
brown,  club  moderate;  third  joint  one-fourth  as  long  again  as  the  fourth, 
fourth  and  fifth  nearly  equal,  sixth  and  seventh  sub-equal  in  length,  the 
latter  very  slightly  thicker,  eighth  elongated,  oval,  not  as  long  as  the  ninth, 
joints  of  club  v(  nearly  equal  length  ;  maxillary  palpi  pale  piceous-brown, 
growing  Y>a.U'r  toward  the  base,  third  joint  nearly  as  long  as  the  first  and 
second  together.  Prothorax  widest  just  before  the  middle,  where  it  is  three- 
fourths  as  wide  as  the  head,  and  nearly  as  wide  as  long:  sides  thence  very 
moderately  convergent  posteriorly  and  nearly  straight ;  anterior  margin  very 
slightly  longer  and  more  arcuate  than  the  posterior ;  surface  rather  strongly 
tuberculate  on  the  sides  at  the  base,  feebly  and  transversely  impressed 
just  behind  the  anterior  margin,  finely  and  irregularly  punctate;  punctures 
widely  separated  near  the  middle,  crowded  toward  the  margins,  interspaces 
feebly  convex,  minutely  reticulated  ;  canaliculation  strong,  deenly  impressed, 
oval,  beginning  distinctly  before  the  middle,  nearly  one-half  as  long  as  the 


COLEOPTERA. 


53 


m. 


proHotiim.  Elytra  at  V/ase  very  slightly  narrower  than  the  head ;  sides 
rather  I'oebly  divergent  posteriorly,  just  perceptibly  longer  than  th<f  width 
at  hi  .!e,  feebly  arcuate;  together  broadly  and  somewhat  feebly  emarginate 
behind;  suture  as  long  as  the  pronotuin,  surface  somewhat  unev(;n,  rather 
finely  and  very  irrei^ularly  punctured;  punctures  isolated  toward  the  suture 
and  the  base,  coalescunt  elsewhere,  especially  near  the  inner  apical  angles, 
toward  which  the  channels  are  generally  more  or  less  convergent.  Abdo- 
minal segments  decreasing  uniformly  and  very  gradually  in  width,  first 
somewhat  narr<.wer  thau  the  contiguous  elytra;  surface  finely  punctulate  ; 
transverse  cnrniae  tricuspid,  cusps  distant,  middh?  ones  long  and  finely  aci- 
culate,  lateral  shorter,  aciculate,  inclined  inward.  Legs  moderate,  f'us(^ous, 
except  the  under  sides  of  the  fetnora,  which  are  rufous  ;  tarsi  slender  ;  first 
joint  of  posterior  twice  as  long  as  the  second  and  slightly  longer  than  the 
fifth,  second  and  third  nearly  eijual. 

Mule, — Under  surface  of  third  ventral  segment  slightly  flattened  in  its 
middle  third,  i^dge  scarcely  modified  ;  fourth  segment  just  p<^rceptibly  emar- 
ginate in  its  middle  three-fifths  at  apex,  emarginatiou  evenly  rounded,  (con- 
tiguous surface  feebly  and  conieallj'  iujpressed  throughout  anteriorly  ;  fifth 
deeply  emarginate  in  its  middle  third  at  apex,  emarginatiou  very  evenly 
rounded,  six  times  as  wide  as  deep,  contiguous  surface  strongly  and  conically 
imj>ressed  throughout  anteriorly,  sides  of  impression  distinct  and  feebly  con- 
vergent ;  sixth  segment  strongly,  narrowly,  and  deeply  sinuate  at  ape*, 
almost  triangularly  incised,  incisure  acutely  rounded  at  the  bottom,  sides 
nearly  straight,  deeper  tlian  wide ;  seventli  segment  broadly  and  fei-bly 
emarginate  at  apex,  emarginatiou  transverse  at  bottom,  teetli  short  and 
setigerous. 

Feiiuile. — Sixth  segment  evenly  rounded  behind  throughout. 

Length  2.8-3.0  mm. 

Cambridge,  Massacluisetts,  8. 

Tlie  convergence  of  the  punctnlar  channels  toward  the  inner  apical 
angles  of  t'le  elyti-a  is  also  mentioned  as  a  peculiarity  of  miUtaris  of 
the  Lake  Superior  region. 

34.  S.  pauper  n.  sp. — Form  slender.  Pubescence  very  fine,  short, 
sparse,  sub-recumbent,  pale  tiavo-cinereous.  Head  rather  largo  and  robust, 
twice  as  wide  as  long  ;  interocular  surface  slightly  depressed,  more  than 
twice  as  wide  as  the  eye,  equally  trilobed  by  the  very  prominent  sulcations  ; 
intermediate  surfuee  evenly  and  strongly  convex,  punctures  round,  rather 
small,  evenly  distributed,  distant  by  more  than  their  own  widths,  inter- 
spaces flat,  I'.ighly  polished  ;  ocular  lines  meeting  at  less  tlian  one  length  in 
advance,  lines  of  juncture  strongly  curved  near  the  front;  antennae  slender, 
much  longer  than  the  width  of  head,  first  joint  black,  remainder  piceous- 
brown,  club  moderate;  third  joint  two-fifths  a'  long  again  as  the  fourth, 
fourth  and  fifth  equal,  sixth  distinctly  longer  and  more  slender  than  the 
seventh,  eighth  sub-globular,  joints  of  club  increasing  in  length  ;  maxillary 
l>alpi  moderate,  first  joint  pale  testaceous,  remainder  dark  piceo-testaceous. 
Protborax  widest  just  before  the  middle,  where  it  is  four-fifths  as  wide  as 


m 

m 


m 
■  '"It 


»^' 


tm 


54: 


NORTH    AMEUICAN 


the  hcrtil,  and  very  slightly  narrower  than  long  ;  sides  thence  moderately 
convergent  anteriorly  and  posteriorly,  and  nearly  straight ;  anterior  and 
posterior  margins  suh-oqnal  in  length  and  curvature;  surface  very  faintly 
tuherculate  on  tin*  sides  at  tht;  liase,  liiiely  and  distantly  punctured,  i)unc- 
tur(!s  somewhat  irregular  in  outline,  and  slightly  narrower  than  the  inter- 
spaces in  the  middle,  the  latter  Hat  <ind  )ninutely  reticulated  ;  canaliculation 
hroadly  oval  and  deeply  impressed,  conspicuous,  hegiuiiing  slightly  before  the 
middle,  one-half  as  long  {»s  the  pronotum.  Elytra  at  biise  distinctly  narrower 
than  the  head;  sides  rather  ■rtrongly  divergent  posteriorly,  very  slightly 
longer  than  the  width  at  hase,  almost  straight,  together  broadly,  roundly, 
and  distinctly  emarginate  behind  ;  suture  about  equal  in  length  to  the  pro- 
notum ;  surface  depressed,  very  feebly  impressed  along  tiie  suture  toward 
the  base,  rather  coarsely,  closely,  and  evciily  ])unctate  ;  punctures  feebly 
imi)ressed,  more  than  twice  as  wide  as  th.'  intersj)aces,  which  are  flattened 
and  somewhat  wider  near  the  inner  basal  angles.  Abdominal  segments 
decreasing  ..  juately  in  width,  and  with  extreme  slowness,  first  somewhat 
wider  than  the  contiguous  elytra  ;  surface  broadly  convex,  very  irregularly 
jiunctulate,  punctures  very  coarse  at  the  bases,  much  finer  and  more  sparse 
at  the  apices ;  transverse  carinae  tricuspid,  middle  cusps  long,  aciculate, 
and  prominent,  lateral  very  short,  rounded  at  ti]>,  broad,  and  rudimentary. 
Legs  short  and  slender,  fuscous  above,  femora  rufous  beneath  ;  first  joint 
of  the  posterior  tarsi  one-third  as  long  again  as  the  second,  and  somewhat 
shorter  than  the  last,  joints  two  to  foar  uniformly  and  rather  rapidly  decreas- 
ing ill  length. 

MiiIp. — Unknown. 

Fmiiilf. — Sixth  ventral  segment  evenly  rounded  behind,  broad. 

Length  2.1  mm. 

Cambridge,  Massacliiisetts,  1. 

Tlie  protliorax  somewliat  resembl<;s  that  of  mendax  in  the  nature 

of  the  sides. 

3.").  S.  silbtilis  n.  sp. — Form  slender.  Pubescence  rather  sliort  and 
sparse,  lliu;,  sub-recumbent,  setiform,  cinereous.  Head  rather  large,  twice 
as  wi<le  as  long  ;  interocular  surface  tlat,  twice  as  wide  as  the  eye,  equally 
trilobed  by  the  faint  sulcatious  ;  intermediate  surface  feebly  and  evenly  con- 
vex ;  punctuation  line,  even,  and  rather  sparse  ;  ocular  Hues  meeting  at  one 
length  in  advance  ;  antennae  scarcely  longer  than  the  width  of  head,  rather 
robust,  club  moderate,  basal  joint  black,  remainder  dark  piceous-brown, 
growing  slightly  paler  toward  tip;  third,  fourth,  and  fifth  joints  uniformly 
decreasing  in  length,  sixth  longer  and  much  narrower  than  the  seventh, 
eighth  wider  than  the  seventh,  globular,  joints  of  club  increasing  slightly  in 
length  ;  maxillary  palpi  moderate,  first  and  second  joints  dark  testaceous, 
first  slightly  the  paler,  third  joint  piceous-black,  and  densely  setigerous. 
Prothorax  widest  slightly  in  advance  of  the  middle,  where  it  is  three-fourths 
as  wide  as  the  ht^ad  and  <listiiictly  narrower  than  long;  sides  thence  moder- 
ately convergent  posteriorly  and  feebly  sinuate;  anterior  margin  very  slightly 
shorter  and  much  more  arcuate  than  the  posterior;  surface  nearly  evenly 
convex,  rather  coarsely,  moderately  closely,  and  very  evenly  punctate,  inter- 


COLEOPTERA. 


6b 


spaces  one-half  as  widt;  as  the  punctures  ;  canaliculation  distinot,  imprpssed, 
liottom  highly  polisluid,  sides  soniewliat  ind(ilinitely  outlined,  beginning 
slif;litly  Ix^fore  the  middle,  one-half  as  long  aa  the  pronoti;m.  Elytra  at 
base  just  perceptibly  narrower  than  the  head;  sides  very  feebly  divergent 
posteriorly,  distinctly  longer  than  the  width  at  base,  very  feebly  arcuate  ; 
toirether  somewhat  angularly  and  distinctly  emarginate  behind  ;  suture 
about  as  long  as  the  pronotum  ;  surface  convex,  nearly  even,  finely,  moder-- 
ately  closely,  and  V(fry  evenly  punctate  ;  punctures  of  different  sizes  and 
sliajies,  interspaces  generally  as  wide  as  the  punctures,  feebly  convex,  and 
very  highly  polished.  Abdominal  segments  decreasing  uniformly  and  just 
perceptibly  in  widtli,  first  as  wide  ab  the  contiguous  elytra;  surface  ratlier 
finely,  sparsely,  and  very  evenly  punctulato,  highly  polislied  and  rather 
convex  ;  transverse  carinae  tricuspid,  middle  ousps  moderate  in  length  and 
finely  aciculate,  lateral  broad,  roundt^d  at  tips,  and  rather  rudimentary. 
Legs  somewhat  long  and  slender,  blackish-fuscous  above,  reddish-fuscous 
beneath,  tibiae  distinctly  curvate,  especially  toward  tips  ;  first  jointof  poste- 
rior tarsi  one-half  as  long  again  as  tlie  second,  and  nearly  as  long  as  the  last, 
joints  two  to  four  uniformly  decreasing  in  length. 

Male. — Posterior  edge  of  fifth  ventral  segment  eniarginate  in  its  middle 
fourth,  emargination  evenly  rounded,  about  ten  times  as  wide  as  deep,  with 
the  angles  slightly  rounded,  contiguous  surface  feebly  flattened  throughout 
anteriorly ;  sixth  segment  sinuate  at  apex,  sinus  and  vertices  equal  in  curva- 
ture, sinus  about  two  and  one-half  times  as  wide  as  deep. 

F'  iiinlc. — Unknown. 

Length  2.3  mm. 

Detroit,  Michigan,  1. 


M 


the  nature 


3(i.  S.  indigent  n.  sp. — Form  rather  slender.  Pubescence  short,  moder- 
ately sparse,  semi-erect,  flavo-cinereous.  Head  robust,  not  twice  as  wide  as 
long  ;  interocular  surface  very  slightly  depressed,  twice  as  wide  as  the  eye, 
c  .sely  and  evenly  punctate,  a  small  spot  on  each  side  near  the  base  inipunc- 
tate ;  longitudinal  ehivation  very  mu(di  narrower  than  the  lateral  portions, 
very  acutely  convex,  prominent,  summit  narrowly  impunctate  ;  ocular  lines 
meeting  at  one  length  in  advance  ;  antennae  dark  piceous-brown  ;  third  joint 
one-third  as  long  again  as  tlu;  fourth,  maxillary  palpi  long,  first  joint  pale 
testaceous,  second  darker,  third  robust,  piceous,  densely  setigerous,  and 
nearly  as  long  as  the  first  two  together.  Prothorax  widest  slightly  behind 
the  middle,  where  it  is  nearly  four-fifths  as  wide  as  the  head  and  distinctly 
narrower  than  long  ;  sides  thence  rather  strongly  convergent  posteriorly  and 
nearly  straight;  anterior  and  posterior  margins  sub-equal  in  length,  the 
former  the  more  arcuate  ;  surface  distinctly  and  obliquely  tuberculate  on 
each  siib*  near  the  base,  closely,  rather  finely,  and  somewhat  confusedly 
punctate  ;  canaliculation  in  the  form  of  an  elongated  erosion,  very  indistinct. 
Elytra  at  base  distinctly  narrower  than  the  head;  sides  ratln^r  strongly 
divergent  posteriorly,  equal  in  length  to  width  of  base,  and  very  feebly 
arcuate ;  together  broadly,  roundly,  and  somewhat  strongly  emarginate 
behirid  ;  suture  scarcely  more  than  seven-eighths  as  long  as  the  pronotum 
surface  depressed,  very  feebly  impressed  on  and  near  the  suture  at  base 


56 


NORTH    AMEUICAN 


III! 


ratlier  finely  and  very  irregularly  punctured  ;  near  tlio  inn»!r  Lasal  angles 
the  punctures  are  widely  isolated,  the  interspaces  tiat  and  highly  jiolisht'd, 
elsewhere,  and  esiiecially  toward  the  inner  apical  angles,  they  ar(^  closely 
compressed,  often  coalescent  and  somewhat  larger.  Abdominal  si'gnients 
decreasing  extremely  gradually  in  width,  first  two  as  wide  as  the  contiguous 
elytra ;  surface  feebly  and  evenly'  convex,  coarsely,  closely,  and  evenly 
puiictulate,  the  punctures  becoming  nuich  liner  and  feebler  toward  the  tip  ; 
transvers'.^  carinae  tricuspid,  cusps  distant,  middle  ones  short  and  linely 
aeiculate,  liitiU-al  nearly  a3  long,  but  very  wide,  rounded  at  tips.  Legs 
fuscous,  rather  long  and  slender;  first  joint  of  posterior  tarsi  two-thirds  as 
long  again  as  the  second,  and  as  long  as  the  last,  joints  two  to  four  uniformly 
and  rather  rapidly  decreasing  in  length. 

Male. — Posterior  edge  of  fifth  ventral  segment  just  perceptibly  eniarginate 
in  its  middle  third,  emargination  evenly  rounded,  and  excessively  feel)le, 
contiguous  surface  feebly  flattened  throughout  anteriorly ;  sixth  segment 
broadly  sinuate  at  apex,  sinus  feeble,  evenly  rounded,  five  to  six  times  as 
wide  as  deep  ;  seventh  segment  transversely  and  feebly  eniarginate  at  apex, 
teeth  very  short. 

Female, — Unknown. 

Length  2.5  nmi. 

AViiverly,  Massacliusetts,  1;  Cambritlge,  Massachusetts,  1. 

The  antennae  are  missing.  Tiiis  species,  althougli  resembling 
placidus  very  cloi-ely,  is,  I  think,  distinct,  because  of  the  differences 
to  be  observed  in  the  structure  of  tlie  {)al[»i  and  elytra. 

37.  S.  siniplex  n.  sp.  (Crotch  MS.). — Form  moderately  robust.  I'ubes- 
cence  exceedingly  short,  sparse,  and  fine,  setiform,  cinereous.  Head  rather 
large,  scarcely  twice  as  wide  as  long  ;  interocular  surface  nearly  Hat,  slightly 
more  than  twice  as  wiile  as  the  eye,  equally  trilobed  by  the  sulcatioiis  which 
are  scarcely  visible  ;  closely,  rather  coarsely  and  evenly  punctate  ;  ocular 
lines  meeting  at  one  and  one-half  lengths  in  advance  ;  antennae  moderately 
slender,  as  long  as  the  width  of  head,  basal  joint  black,  remainder  piceous- 
brown,  club  large  and  prominent ;  third  joint  one-third  as  long  again  as  the 
fourth,  fourth  and  fifth  equal,  sixth  and  seventh  equal  and  shorter,  seventh 
thicker  than  the  sixth,  eighth  short  and  thicker  than  the  seventh,  joints  of 
club  increasing  in  hmgth,  last  joint  elongated,  acuminate  at  tip  ;  first  joint 
of  maxillary  palpi  and  base  of  the  second  fiavo-testaceous,  remainder  pale 
piceous-brown.  Prothorax  widest  before  the  middle,  where  it  is  four-fifths 
as  Avide  as  the  head,  and  slightly  narrower  than  long  ;  sides  thenci!  rather 
feebly  convergent  posteriorly  and  strongly  sinuate  ;  anterior  margin  shorter 
and  more  arcuate  than  the  posterior,  the  latter  nearly  transverse ;  surface 
feebly  and  transversely  impressed  just  behind  the  anterior  margin,  and 
faintly  tuberculate  at  each  side  near  the  base  ;  rather  finely,  variolately, 
closely,  and  somewhat  irregularly  punctured,  interspaces  very  narrow,  flat, 
shining,  and  minutely  reticulated  ;  canaliculation  irregular,  shallow,  begin- 
ning before  the  middle,  and  extending  to  within  one-fourth  the  hingth  from 
the  posterior  margin.     Elytra  at  base  very  slightly  narrower  than  the  head, 


m 


coleoptp:ra. 


57 


sides  feebly  divt^rgent  posteriorly  and  feebly  arcuate,  somewliat  longer  than 
the  widtli  at  base  ;  together  broadly  and  riitlier  feebly  eniarginate  jwisteriorly  ; 
suture  one-llftli  as  long  again  an  the  i)ron()tuni ;  surface  feebly  impressed 
at  the  base  on  the  suture,  co.arsely,  closely,  variolately,  and  irregularly 
punctured ;  punctures  coaloscent  longitudinally,  interspaces  flat,  shining, 
generally  very  narrow.  Abdominal  segments  uniformly  and  rather  rapidly 
decreasing  in  widtli,  first  very  slightly  narrower  than  the  contiguous  elytra; 
border  prominent ;  siirface  coarsely  and  feebly  punctulate  anteriorly  ;  very 
finely  punctulate  posteriorly  ;  transverse  carinae  tricuspid,  middle  cusps 
long,  well  developed,  and  aciculafe,  lateral  very  rudimentary,  intervals 
feebly  sinuate.  Legs  moderate,  jiiceous-brown  throughout  ;  first  joint  of 
the  posterior  tarsi  slightly  more  than  twice  as  long  as  the  second,  as  long 
as  the  next  three  together,  second  slightly  longer  than  the  third.  Under 
surface  of  abdomen  piceous-black,  paler  toward  the  vertex. 

Afiilc. — Posterior  edge  of  the  fifth  ventral  segment  feebly  eniarginate  in  its 
middle  third,  emargination  evenly  rounded  throughout,  twelve  times  as  wide 
as  deep,  contiguous  surface  very  feebly  and  cylindrically  impressed  through- 
out anteriorly,  borders  of  the  impression  densely  ciliate  ;  sixth  segment 
sinuate  at  apex,  sinus  slightly  more  acutely  rounded  than  the  apices,  twice 
as  wide  as  deep,  surface  of  segment  not  impressed  ;  seventh  segment  broadly 
and  evenly  eniarginate  at  apex,  emargination  densely  fringed  with  -hort, 
cinereous  setae. 

Fvmiile, — unknown. 

Length  3.0  mm. 

Oregon,  1. 

I  have  retained  the  manuscript  name  attached  by  Mr.  Crotch  to 
the  unique  specimen. 


38.  S.  TicinilS  n.  sp. — Form  rather  slender.  Pubescence  extremely 
sparse,  sliort,  and  line,  setiform,  cinereous.  Head  moderate,  slightly  more 
than  twice  as  wide  as  long  ;  interocular  surface  very  feebly  depressed,  two 
and  one-third  times  as  wide  as  the  eye  ;  punctures  not  coalescent,  line,  very 
closely  crowded  near  the  eyes,  coarser  and  more  distant  along  the  middle ; 
longitudinal  elevation  scarcely  more  tlian  one-half  as  wide  as  the  lateral 
jiortions,  rather  strongly  but  evenly  convex  ;  ocular  lines  meeting  at  two 
lengths  in  advance  ;  antennae  very  slightly  longer  than  the  width  of  bead, 
robust,  club  moderate,  basal  joint  black,  remainder  dark  piceous-broivii ; 
third  joint  one-fourth  as  long  again  as  the  fourth,  fourth  and  fifth  ecjual, 
sixtli  and  seventh  equal  in  length,  the  latter  tliicker,  eighth  slightly  elon- 
gated, as  wide  as  the  seventh,  joints  of  club  increasing  in  length,  last  two  of 
ecjual  thickness,  last  joint  conoidal ;  first  joint  of  maxillary  palpi  pale  ttista- 
ceous,  second  and  third  slightly  darker,  piceous.  Prothorax  widest  at  the 
middle,  where  it  is  perceptibly  narrower  than  long  ;  sides  thence  moderately 
convergent  posteriorly  and  nearly  straight ;  anterior  margin  slightly  longer 
and  more  arcuate  than  the  posterior  ;  surface  m-arly  evenly  convex,  rather 
finely,  closely,  variolately,  and  irregularly  punctured,  punctures  not  coales- 
cent ;  canaliculation  very  narrow,  shallow,  irregularly  outlined,  beginning 
slightly  before  the  middle  and  equal  iu  length  to  one-half  the  pronotum. 


08 


NOUTII    AMKRICAN 


Elytra  at  baso  aliout  equal  in  width  to  the  head  ;  siilcs  nearly  j>arall('l, 
slifihtly  arunate,  longer  than  the  widtli  at  base;  together  broadly,  very 
evenly,  and  feebly  eniarginate  posteriorly  ;  suture  one-fifth  as  long  airain  as 
the  pronotuni ;  surfauo  broadly  convex,  broadly  and  feebly  inij)ressed  about 
the  suture  at  the  base  ;  ratheY  llnely,  deeply,  and  soniiswhat  irregularly 
punctate,  punctures  seldom  coalescing,  exceiit  at  a  small  spot  near  the  centre 
of  each  elytron.  Abdominal  segments  decreasing  vory  uniforndy  and  ([uite 
rajiidly  in  width,  lirst  somewhat  narrower  fliaii  tlie  contigncuis  elyti'a;  sur- 
face conv<(x,  finely,  and  closely  punctulato  ;  transverse  carinae  tricuspid, 
cusps  quite  approximattf,  middle  short,  aciculate  at  tip,  lateral  broad,  ex- 
panding at  tip,  intervals  strongly  sinuate.  Legs  rather  long  and  slender, 
pale  piceous  and  rufo-pieeous  ;  lirst  joint  of  posterior  tarsi  twice  as  long  as 
the  second,  joints  two  to  four  very  narrow  at  base,  decreasing  uniformly  in 
length,  fifth  very  narrow  at  base. 

Mule. — Posterior  edge  of  tin*  fifth  ventr.al  segment  einarginate  in  its  middle 
third,  emargination  evenly  rounded,  very  feeble,  twelve  times  as  wide  as 
deep;  sixth  segmcuit  sinuate  at  apex,  sinus  and  vertices  eijual  in  width  and 
curvature,  sinus  but  slightly  widt^r  tlian  deep  ;  seventh  broadly  and  feebly 
emarginate  at  the  vertex. 

FnmiJc. — Sixth  segment  rounded  behind. 

Leiigtli  13.0  unu. 

District  of  Columbia,  1  ;   Pennsylvania,  20;  Selma,  Alabama,  1. 

A  very  common  species,  abounding  on  tiie  shores  of  Delaware  Bay 
below  riiiladelphia  ;  it  also  occurs  under  debris  on  the  beach  at  Cape 
May,  N.  J. 

30.  S.  ingratllS  n.  sp. — Form  rather  slender.  Pubescence  moderately 
short,  sub-recumbent,  coarse,  rather  close,  pale  fulvo-cinereous,  sonunvliat 
conspicuous.  Head  moderate  or  small,  twice  as  wide  as  long ;  interocular 
surface  nearly  Hat,  rather  more  tlian  twice  as  wide  as  the  eye,  e(]ually  tri- 
lobed  by  th<^  very  wide  an<l  gently  rounded  sulcations  ;  intermediate  surface 
evenly  and  feebly  convex,  punctures  small,  rounded,  rather  close,  very  (evenly 
distributed;  ocular  lines  meeting  at  two  lengths  in  advance  ;  antennae  short, 
scarcely  as  long  as  the  width  of  head,  dark  piceous-brown,  basal  joint  black- 
ish, somewhat  robust,  club  moderate;  joints  tbrei^  to  six  nearly  uniformly 
and  (juite  rai)idly  decreasing  in  length,  sixth  sligiitly  h)nger  and  much  more 
slender  than  the  seventh,  eighth  slightly  narrower  than  the  seventh,  globu- 
lar, middle  joint  of  club  much  the  thickest ;  maxillary  jialpi  moderat(s  dark 
piceous-brown,  basal  joint  rather  pale  piceo-testaceoiis.  Prothorax  arcuately, 
evenly,  and  rather  rapidly  widening  to  the  middle,  where  it  is  four-fifths  aj 
wide  as  the  head  and  distinctly  narrower  than  long;  sides  thenc(*  rather 
rapidly  convergent  and  sinuate  ;  anterior  margin  just  perceptibly  longer  and 
more  arcuate  than  the  posterior  ;  surface  rather  finely,  feebly,  distantly,  and 
evenly  punctate;  pun  'ures  round,  separated  by  their  own  widths,  inter- 
spaces nearly  flat,  polished  ;  canaliculation  oblong,  bi^ginning  very  slightly 
before  the  middle,  equal  in  length  to  two-fifths  that  of  the  pronotum,  feebl^', 
and  roundly  impressed.  Elytra  at  base  equal  in  width  to  the  head  ;  sides 
strongly  divergent  posteriorly,  longer  than  the  width  at  base,  straight  for  a 


COLEOPTERA. 


59 


sliort  (list.iiico  anteriorly,  then  rather  stron),My  arcuate  hehiii<l ;  tofjcthor 
brt>a(lly,  roundly,  and  rather  strongly  eniarginate  behind  ;  suture  scarcely 
one-eighth  as  long  again  as  the  ])ronotuin  ;  surface  I'ather  ileprt^ssed,  nearly 
even,  rather  coarsely,  fee))ly,  and  evenly  purictate  ;  punctures  round,  not 
.seimrated  hy  their  own  widths,  occasionally  partially  coalescent  in  twos,  but 
not  completely  so  ;  interspaces  feebly  convex  .  .  shining.  Abdominal  seg- 
ments decreasing  nearly  uniformly  and  gradually  in  width,  first  as  wide  as 
the  contiguous  elytra  ;  surface  highly  polished,  rather  coarsely,  closely,  and 
evenly  pinictulate  ;  transverse  carinae  tricuspid,  niiddli-  cusps  strong,  be- 
coming finely  acicular  toward  the  tips,  lateral  much  shorter  and  somewhat 
rudimentary;  cus])S  widely  st!i)arated.  Legs  slioi't  and  slentK'r,  dark  )iice- 
(Uis-liidwn,  iH^arly  black  above  ;  first  joint  of  posterior  tarsi  tv.ici'  as  long  as 
the  second,  shorter  than  the  iifth,  joints  tw(j,  three,  and  four  \-i.'vy  short, 
sub-eipial. 

Mtilc. — Unknown.  * 

J-'imalc. — Sixth   ventral   segment   rather  elongated,  very  evenly,  though 
rather  narrowly,  rounded  behind. 
Length  2.8-3.1  nun. 

Detroit,  ]Micliigan,  1. 

Ivcsoinbles  parullehis  somewhat  ;  the  punctuation,  however,  is 
miK'li  liner  and  of  a  diHercnt  cliaraeter.  It  may  prove  (litriciilt,  in 
sonic  sjiecimens,  to  determine  to  wiiicii  group  it  belongs,  owing  to  the 
punctures  being  almost  entirely  isolatiid. 

4l'.  S.  IieglectllS  n.  sp. — Form  rather  slender.  Pubescence  so  sparse 
and  fiije  as  to  he  scarcely  visible  on  the  head,  prothorax,  and  elytra,  longer 
(ui  the  abdomen,  where  it  increases  in  length  toward  the  tip,  and  becomes 
recumbent,  cinereous.  Head  moderate,  twice  as  wide  as  long  ;  interocular 
surface  feebly  excavated,  twice  as  wide  as  the  eye ;  coarsely,  somewhat 
evenly  punctured,  interspaces  one-half  as  wide  as  the  punctures,  polished; 
equally  trilobed  by  the  very  distinct  sulcations  ;  intermediate  elevation  con- 
vex ;  antennae  much  longer  than  tiie  width  of  head,  very  shMider,  first  two 
joints  black,  remainder  piceous-black,  club  very  slender  ;  third  joint  one- 
third  as  long  again  as  the  fourth,  joints  four  to  six  uniformly  decreasing  in 
length,  eighth  very  small,  elongated,  joints  of  club  increasing  in  length,  last 
two  of  e(iual  thickness  ;  maxillary  i)alpi  translucent,  lirst  joint  rufo-testa- 
ceous,  second  darker,  third  almost  black.  Prothorax  similar  to  that  of  S. 
iutnisus.  Elytra  at  base  as  wide  as  the  head ;  sides  divergent  posteriorly 
and  arcuate,  more  strongly  so  posteriorly  ;  together  broadly  and  somewhat 
strongly  eniarginate  posteriorly;  suture  just  percei)tibly  longer  than  the 
pronotum  ;  surface  somewhat  impressed  on  the  suture  at  the  base ;  very 
coarsely,  deeply,  and  irregularly  sculptureil ;  j)unctures  occasionally  isolated 
and  rounded,  at  other  spots  joined  into  tortuous  channels,  interspaces  at 
some  points  in  the  form  of  acute  ridges,  at  otliers  as  broad  as  the  channels, 
very  convex  and  polished,  exhibiting  at  the  same  time  a  very  minute  reticu- 
lation. Abdominal  segments  decreasing  regularly  and  gradually  posteriorly, 
first  nearly  as  wide  as  the  contiguous  elytra  ;  border  strong  ;  surface  convex, 


■.-,      T 


MM 


CO 


NORTH    AMKRICAN 


polisliffl,  very  sparsely  and  finely  piinctulate  ;  transverse  carinae  tricusjiid, 
middle  cnsps  fine  and  auieular,  lateral  nearly  as  long,  dilated  at  apex,  and 
inclined  inward,  intervals  moderately  sinuate.  Under  surface  dark  jjiceous. 
Legs  rather  slender,  piceous  ;  first  joint  of  the  posterior  tarsi  twice  as  long 
as  the  second,  second  notably  longer  than  the  third. 

Miilv. — I'osterior  edge  of  the  fifth  ventral  segment  feehly  eniarginate  in  its 
middle  third,  emargination  evenly  rounded,  ten  times  as  wide  as  deep,  con- 
tiguous surface  sonn^what  deeply  and  conically  impressed,  impression  disap- 
pearing anteriorly  at  one-half  the  length  of  tlie  segment,  having  llu»  borders 
sharply  defined  and  clothed  with  exceedingly  long  st'tae ;  sixth  si^gnient 
sinuate  at  ap'ex,  sinus  acutely  rounded  at  bottom,  twice  as  wide  as  deep  ; 
seventh  broadly  and  deeply  emarginate  at  apex,  provided  with  two  long  stiff 
setae. 

Female. — Sixth  segment  evenly  rounded  behind  without  any  perceptible 
irregularity. 

Length  3.8-4.0  mm. 

Cambridge,  Massachusetts,  1  ;  Grimsby,  Ontario,  3  ;  liliiiois,  1  ; 
Nebraska,  1. 

Resembles  intrvsus  somewbat ;  it  may  be  distingiiisbed  at  once 
from  tbat  species  by  its  deeper,  closer,  and  much  more  clianneled 
elytral  sculpture,  as  well  as  by  very  decided  dlHerences  in  tlie  sexual 
characters.  It  appears  to  be  much  less  abundant  than  intrusus,  and 
is  very  slightly  more  elongated  in  form. 


41.  S.  acubiosiis  n.  sp. — Form  nearly  as  \n  fenmratns.  Pubescence  very 
short  and  sparse,  sub-recumbtMit,  fine,  pale  flav  -inereous  on  the  abdomen, 
dark  plumbeous  on  the  remainder  of  tiie  upper  surface.  Head  robust,  twice 
as  wide  as  long;  interocuiar  surface  scarcely  twice  as  wide  as  the  eye,  dis- 
tinctly depressed  ;  longitudinal  elevation  slightly  narrower  than  the  lateral 
portions,  rather  strongly  and  evenly  convex  ;  sulcations  distinct ;  punctures 
small,  round,  isolated,. moderately  impressed,  close;  ocular  lines  meeting  at 
slightly  less  than  one  length  in  advance;  antennae  distinctly  long(?r  than 
the  width  of  head,  slender,  basal  joint  black,  remainder  dark  piceous-brown, 
club  slender,  much  elongated  ;  third  joint  slightly  bent,  more  than  one-half 
longer  than  the  fourth,  fourth  and  fifth  equal,  sixth  and  seventh  snb-equal 
in  length,  the  latter  much  the  more  robust,  eighth  one-fourth  longer  than 
wide,  as  roltust  as  the  seventh,  ovoidal,  joints  of  club  increasing  very  rapidly 
in  length,  last  nearly  twice  as  long  as  wide  ;  maxillary  palpi  long  and  slender, 
piceous-brown  throughout.  Prothorax  arcuately,  evenly,  <and  rather  rapidly 
increasing  in  width  to  a  point  distinctly  behind  the  middhi,  where  it  is 
five-sixths  as  wide  as  the  head,  and  slightly  narrower  than  hmg;  sides 
tlience  rapidly  convergent  posteriorly  and  distinctly  sinuate  ;  anterior  margin 
slightly  shorter  and  very  slightly  more  ai'cuate  than  the  posterior ;  surface 
strongly  and  distinctly  tuberculate  near  the  basal  angles,  transversely  and 
feebly  impressed  just  behind  the  apex  ;  feebly,  minutely,  closely,  and  con- 
fusedly punctate,  transversely  channeled  in  front  of  the  middle  ;  canalicula- 
tiou  terminating  at  equal  distances  from  the  base  and  apex,  fusiform,  rather 


COLEOrTERA. 


61 


ileeplv  impressed,  slightly  more  than  one-half  as  long  as  the  pronotiun, 
Ixittom  imptinctate  and  .shining.  Elytra  at  hast;  distinctly  narrower  than 
the  head  ;  sidei^  moderately  divergent  posteriorly,  slightly  longer  than  the 
width  at  hase,  feebly  arcuate  ;  together  broadly  and  rather  strongly  emargi- 
nate  behind  ;  suture  on<;-lifth  longer  than  the  }>ronotum  ;  surface  rather 
depressed,  feebly  impressed  on  the  suture  near  the  base,  rather  feebly,  very 
closely  and  confusedly  punctate  ;  punctures  seldom  coalescing,  interspaces 
varying  in  width,  moderately  convex,  and  comparatively  lustreless.  Abdo- 
minal segments  decreasing  uniformly  and  very  gradually  in  width,  first  very 
slightly  narrower  than  the  contiguous  elytra;  surfacie  shining,  extremely 
feebly,  iinely,  evenly,  and  rather  distantly  punctulate  ;  transverse  carinae 
tricuspid,  middle  cusps  strong,  finely  aticulate  at  apex,  lateral  much  shorter 
and  broader,  acuminate  at  tip.  Legs  moderate,  slender,  i..scous  above, 
femora  rather  pale  rufous  benciath,  jxisterior  femora  long,  slender,  and  very 
straight;  first  joint  of  |)osterior  tarsi  twice  as  long  as  the  second,  and  dis- 
tinctly longer  than  the  fifth,  joints  two  to  four  decreasing  uniforndy  and 
rather  grailually  in  length. 

Male. — Unknown. 

Fcmnle. — Sixth  ventral  segment  very  feebly  and  narrowly  bilobed. 

Length  3.3  mm. 

Miiniuette,  Lake  Superior,  1. 

Tliis  species  bears  a  considerable  resemblance  to  femorutus  Say  ; 
tlie  similarity  is  superficial,  however,  as  the  punctuation  is  of  an 
entirely  different  order. 


42.  S.  vespertinus  n.  sp. — Form  robust.  Pulwscence  moflerately 
short,  fine,  semi-erect,  setiform,  rather  close,  evenly  distributed,  pale  piceo- 
cinereous.  Head  rather  small,  robust,  twice  as  wide  as  long ;  interocular 
surface  nearly  Hat,  twice  as  wide  as  the  eye,  e(iually  trilobed  by  the  very 
strong  rounded  sulcations  ;  intermediate  surface  evenly  and  strongly  con- 
vex ;  finely,  rather  evenly,  and  somewhat  distantly  punctate,  interspaces 
flat  and  moderately  lustrous  ;  ocular  lines  meeting  at  two-thirds  of  a  length 
in  advance  ;  antennae  very  slightly  longer  than  the  width  of  head,  piceous- 
black,  slender,  club  moderate ;  third  joint  one-third  as  long  again  as  the 
fourth,  fourth  and  fifth  equal,  sixth  and  seventh  equal  in  length,  the  latter 
one-half  as  thick  again,  eighth  as  wide  as  long,  sub-globular,  joints  of  club 
sub-globular,  last  slightly  elongated  ;  maxillary  palpi  rather  long  and  slen- 
der, piceous-black,  first  joint  deep  rufo-testaceous,  third  somewhat  flattened 
and  dcujely  clothed  with  short,  semi-erect,  cinereous  setae.  Prothorax 
robust,  widest  just  before  the  middle,  where  it  is  four-fifths  as  wide  as  the 
head,  and  as  broad  as  long  ;  sides  thence  slightly  less  rajjidly  convergent 
anteriorly  than  posteriorly,  and  nearly  straight;  anterior  margin  slightly 
longer  and  more  ai'cnate  than  the  posterior  ;  surface  nearly  evenly  convex, 
very  faintly  and  obliquely  tuberculate  near  the  basal  angles  ;  finely,  moder- 
ately closely,  and  rather  confusedly  punctate,  interspaces  flat ;  canalicula- 
tion  in  the  form  of  a  very  faint  erosion,  which  is,  however,  clearly  outlined, 
slightly  nearer  the  base  than  the  apex,  and  two-thirds  as  long  as  the  pro- 
notum.     Elytra  at  base  distinctly  wider  thau  the  head  ;  sides  very  feebly 


62 


NOHTII    AMKUICAN 


(livcrscKt  ]instiTii)rly,  just  jn'rccptilily  longer  thiiii  Iwaal  wiiUli,  mid  ratlicr 
ft'(*My  ai'c'UJiti' ;  tn(,'t'tlu'r  rntluT  broadly  niiil  stroiifjly  uinar);inat(!  lichiiid; 
siitiiri'  alidiit  oiK'-tliird  an  Ion;;  n^aiti  as  tlio  i)roiiotiini ;  Hurfaci^  ratlicr  (•oiivcx, 
very  lc(!l)ly  iiniircsscd  on  the  sutiiiM;  unar  the  liaHc,  rather  Unely  and  moder- 
ately cloHely  piuictiired  ;  puncture's  confused  near  the  exterior  margins,  mote 
distant  and  even  near  the  siitnve,  where  they  are  Heldom  eoa!esc(Mit  ;  inter- 
spaces nearly  Hat,  polished.  Abdominal  segments  decreasing  uniformly  and 
gradually  in  width,  first  as  wide  as  the  contiguous  elytra  ;  surface  Vi'iy  broad, 
rather  coarsely,  closely,  and  evenly  punctulate,  much  more  linely  so  toward 
till!  tip,  and  also  finer  at  the  apices  of  the  segimmts  than  at  the  bases  ;  trans- 
verse carinae  tricuspid,  middle  cusps  strong,  rather  long  and  finely  acumi- 
nate at  tip,  lateral  scarcely  one-half  as  long,  broad,  somewhat  rudimentary. 
Legs  rather  short  and  stout,  black  throughout ;  first  joint  of  the  posterior 
tarsi  two-thirds  as  long  again  as  the  second,  somewhat  longer  than  the  last, 
second  much  longer  than  the  third,  first  four  joints  cylindrical  and  eijiial 
throughout  in  thickness,  fifth  ioint  narrower  at  base  than  at  tip. 

Mali-. — Unknown. 

Female, — Sixth  ventral  segment  broad  and  evenly,  though  rather  obtusely 
rounded  behind. 

Length  3.1  mm. 

Tenino,  Wasliington  Territory,  1. 
This  is  a  very  distinct  species. 


43.  S.  couvictor  n.  sp. — Form  very  moderately  robust.  Pubescence 
short,  fine,  rather  close  except  at  the  lij)  of  \.\w  abdomen,  where  it  is  fine, 
long,  sparse,  and  recumbent,  piceous.  Head  robust,  not  twice  as  wide  as 
long  ;  iuterocular  surface  nearly  three  times  as  wide  as  the  eye,  flat,  closely, 
rather  coarsely,  evenly,  and  sub-variolately  punctate,  punctures  often  coales- 
cing ;  longitudinal  idevatiou  narrower  than  tlie  lateral  portions,  evenly  and 
ratlier  strongly  convex  ;  ocular  lines  meeting  at  one  and  one-half  lengths  in 
advance  ;  antennae  slightly  longer  than  the  width  of  head,  slender,  piceous- 
black,  club  raodei'ate  ;  third  joint  one-third  as  long  again  as  the  fourth, 
fourth  very  slightly  longer  than  the  fifth,  eighth  as  long  as  the  ninth,  last 
joint  much  elongated,  acuminate  at  tip  ;  maxillary  palpi  rather  long  and 
slender,  first  joint  translucent,  testaceous,  remainder  piceous-black.  Pro- 
thorax  robust,  arcuately  widening  to  the  middle,  where  it  is  five-sixths  as 
wide  as  the  head  and  as  broad  as  long  ;  sides  thence  rather  strongly  conver- 
gent, and  very  feebly  sinuate  ;  anterior  margin  shorter  and  more  arcuate 
than  the  posterior ;  surface  slightly  swollen  along  the  sides  and  at  the  edges 
of  the  canaliculation,  transversely  and  rather  strongly  impressed  just  behind 
the  anterior  margin  ;  rather  finely,  very  closely,  evenly,  and  very  confusedly 
punctate  ;  punctures  sub-variolate,  very  irregular  in  outline  ;  canaliculation 
rather  narrow,  impressed,  terminating  at  equal  distances  from  the  margins, 
three-fourths  as  long  as  the  pronotum.  Elytra  at  base  just  perce])tibly 
broader  than  the  head ;  sides  very  moderately  divergent  posteriorly,  longer 
than  the  width  at  base,  and  feebly  arcuate  ;  together  broadly  and  very  ftsebly 
emarginate  behind;  suture  nearly  one-third  as  lon^r  again  as  the  pronotum  ; 
surface  rather  convex,  impressed  on  the  suture  toward  the  base ;  very  closely, 


COLKOPTERA. 


03 


finely,  and  ronfiiHcdly  ,sculi)ture(l  ;  iJinicturcH  only  isolated  near  tln^  inner 
basiil  Mn},'l('H,  eJHi'wliere  coali'scent  in  very  lonj,'  eliannels,  wliieh  ace  iisiiaily 
liingitiKliiial  near  Hit!  Mnture.  Abdominal  McgmentH  deert-a.-^iiig  unit'ornily 
and  moderately  rapidly  in  width,  first  notably  narrower  than  tlie  (;ontij;u(Ui8 
elytra:  surface  rather  convex,  liifjhly  jioIIsIkmI  ;  feehly,  finely,  closely,  and 
evenly  pnnctiilate ;  transverse  carinae  frii'uspid,  middle  ciisiis  tine  and 
aciculato,  lateral  broad,  lar^e,  and  vary  confusedly  outlined.  Legs  ratlier 
short  and  slender.  Mack  above,  jiieoous-brown  beneath;  first  joint  of  the 
jiosterior  tarsi  four-llfths  as  long  again  as  the  second,  slightly  longer  tlian 
the  last,  and  eijual  to  the  second  and  third  together. 

Male, — Fifth  ventral  segment  not  nioditled  ;  sixth  segment  sinuate  at  apex, 
sinus  and  apiues  eijnal  in  width  and  curvature,  sinus  twice  as  wide  as  deep; 
seventh  segment  feebly  t-marginate  at  tiji,  emargination  evenly  rounded  and 
very  slight,  teeth  not  developed. 

Frimile. — Un  k  nown . 

Length  3.3  mm. 

Washington  Territory,  1. 

44.  S.  COnfllHll!^  n.  sp. — Form  moderately  robust.  Pubescence  exces- 
sively tine,  sparse,  and  short,  sotiform,  cinereous.  Head  rather  large,  twice 
as  wide  as  long  ;  interocular  surface  feebly  excavated,  twice  as  wide  as  the 
eye,  finely,  rather  closely,  and  evenly  punctured  ;  punctures  round  and 
sometimes  partially  coalescing  ;  longitudinal  elevation  narrower  than  lati'ral 
I»irtions,  strongly  a'ld  evenly  convex,  prominent,  crest  impunctate  ;  ocular 
lines  meeting  at  one  length  in  advance  ;  antennae  scarcely  longer  than  the 
width  of  head,  rather  slender,  club  distinct,  dark  piceons-brown  ;  third  joint 
one-third  as  long  again  as  the  fourth,  fourth  and  lifth  equal,  sixth  and 
seventh  ecpial  in  length,  shorter,  eighth  elongated,  broader  than  the  sixth, 
joints  of  club  increasing  uniformly  in  lengtli  and  thickness  ;  first  joint  of 
maxillary  palpi  rufo-testaceous,  base  of  second  darker,  remainder  piceous. 
Prothorax  widest  at  one-third  its  length  posteriorly,  where  it  is  three-fourths 
as  wide  as  the  head  and  very  slightly  narrower  than  long  ;  sides  thence  very 
moderately  convergent  and  nearly  straight;  anterior  margin  more  arcuate 
and  just  perceptibly  shorter  than  the  posterior  ;  surface  faintly  bitul)erculate 
at  tlio  sides,  feebly  and  transversely  impressed  behind  the  anterior  niaigin  ; 
finely  and  somewhat  evenly  punctate,  interspaces  one-half  as  wide  as  the 
punctures,  rather  flat,  shining  ;  canaliculation  distinct,  fusiform,  deeply 
impressed,  beginning  just  before  the  middle  and  extending  posteriorly  for 
two  fifths  the  total  length.  Elytra  at  base  distinctly  narrower  than  the 
head  ;  aides  moderately  divergent  posteriorly  and  nearly  straiglit,  longer 
than  the  width  at  base;  together  very  broadly  and  triangularly  eniarginate 
posteriorly ;  suture  slightly  longer  than  the  pronotum ;  surface  convex,  im- 
pressed along  the  suture,  strongly  so  at  base ;  each  elytron  also  has  a  short 
longitudinal  impression  in  the  middle  at  the  base ;  finely  and  irregularly 
punctured,  punctures  widely  separated  near  the  inner  basal  angles,  closely 
crowded  near  the  middle  and  exteriorly,  interspaces  flat,  poiished.  Abdo- 
minal segments  decreasing  excessively  gradually  but  uniformly  in  width, 
first  somewhat  narrower  than  the  contiguous  elytra ;  surface  broadly  convex, 


44 


■I 


W. 


Ill 


I'm 


64 


NORTH    AMKHICAN 


flnnly  ami  ratii«r  oloHcly  puiictiilate ;   traiinvfrso  oarinno  trieuspid,  ciLsps 
widdly  s('|i;iiiitf(l,  slioif,  iiiiilillt^  mn's  aciciilatc  at  t>p.s  ;   iiiidtT  siiiiacf  lliicly 
and  sparsi'ly  puuctulati-,  pi(u«>in-l)lack,  deiiHcly  ptiln-sciMit.     Legs  inodcrati', 
fuscd-pirt'oiis ;  llrnt  joint  of  the  posturior  tai'Hi  twice  uh  long  as  the  second 
socond  very  slif,'iitiy  longi'f  than  the  tliird. 

Mule. — L'lilvMown. 

Fcmule, — Sixth  vt^ntral  se>;uient  Iiaving  traces  of  a  slight  hilohation  at 
apex,  otherwise  evenly  rounded. 

Length  2.7  mm. 

Wliite  Fisli  Point,  Micliigan,  1. 


4r).  8.  inorikatllH  n.  sp.  (Sohwarz  MS.). — Form  rather  slender.  Puhes- 
cenco  moderately  close  and  long,  semi-erect,  setiform,  cinereous,  and  rather 
conspicuous.  Head  moderate,  slightly  more  than  twice  as  wide  as  long  ;  inter- 
ocular  surface  nearly  Hat,  sliglitly  more  than  twi(!e  as  wide  as  the  eye  ;  closely, 
evenly,  and  linely  punctate  throughout  ;  interspaces  one-half  as  wide  as  the 
punctures,  convex,  polished  ;  longitudinal  elevation  as  wide  as  tlio  lateral 
portions,  evenly  and  moderately  convex,  very  apparent ;  ocular  lim-s  meeting 
at  over  two  h^ngths  in  advance ;  antennatt  longer  than  the  width  of  head, 
rather  slender,  piceous-Mack,  chih  small ;  third  joint  one-third  as  long  again 
as  the  fourth,  fourth  and  llfth  ecjual,  sixth  much  longer  and  narrower  than 
seventh,  eighth  elongated,  nearly  as  thick  as  the  seventh,  joints  of  cluh 
increasing  in  length,  last  two  equal  in  width,  last  as  long  as  the  eiglith  and 
ninth  together ;  maxillary  palpi  dark  i)iceous,  first  joint  slightly  paler. 
Prothorax  widest  slightly  before  the  middhs  where  it  is  four-llfths  as  wide 
as  the  head,  and  very  slightly  narrow-T  than  long  ;  sides  thence  very  moder- 
ately eonvei'gent  posterioi'ly  and  very  feebly  simiate ;  anterior  and  posterior 
margins  equal  in  length,  the  former  the  more  arcuate  ;  surface  rather  evenly 
convex,  closely,  rather  finidy,  and  evenly  ]iUnctur(Hl ;  punctures  polygonal 
in  outline,  interspaces  one-fourth  their  width,  convex,  and  polished  ;  canali- 
culation  distinct,  sotnewhat  irregular  in  outline,  roundly  ini]iressed,  begin- 
ning slightly  before  the  middle,  and  equal  in  length  to  one-llalf  that  of  the 
pronotum.  Elytra  at  base  as  wide  as  the  head  ;  sides  nearly  parallel,  slightly 
longer  than  the  width  at  base;  together  moderately  euiarginate  posteriorly; 
suture  slightly  longer  than  the  pronotum  ;  surface  evenly  and  rather  strongly 
convex,  deejily,  very  closely,  rather  finely,  and  evenly  punctate^,  interspaces 
narrow,  convex,  and  polished.  Abdominal  segments  decreasing  uniformly 
and  extremely  gradually  in  width,  lirst  as  wide  as  the  contiguous  (dytra ; 
surface  convex,  evenly,  rather  coarsely,  and  moderately  closely  punctulate  ; 
transverse  carinae  i:ricuspid,  middle  cusps  long  and  acicular,  lateral  one-half 
as  long,  broad,  truncate  at  tip.  Legs  dark  piceous  above,  rufo-pieeous  be- 
neath, rather  short  and  stout ;  first  joint  of  the  posterior  tarsi  three-fourths 
as  long  again  as  the  second,  and  as  long  as  the  second  and  third  together, 
last  joint  longer  than  the  first. 

Mah. — Posterior  edge  of  the  fifth  ventral  segment  feebly  emargiiiate  in  its 
middle  fourth,  emargination  evenly  rounded,  and  ten  times  as  wide  as  deep, 
contiguous  surface  flattened  throughout  anteriorly,  and  bordered  with  long, 


COLEOI'TKUA. 


or) 


siiiii-i'Odumbeiit,  picoouH  Hcitnti ;  sixth  Hogmcnt  Himintt^  nt  nju-x,  HiniiH  Home- 
wliiit  iiioro  brixiilly  iouikIi'iI  tliaii  tln'  iipid'H,  four  titni'H  ah  wi(l«  hh  ilci-p. 

l-'imiilf. — Sixth  Hci,'iiiciil  i'vi')ily  rdiiinlcil  licliiml  throughout. 

I,i'ii),'tii  :J.(!-2.!I  mill. 

('ainl»ritl<;»s  ]\IasMiicliii8etts, -l ;  Detroit,  Micliiyim,  7  ;  Wliite  Fish 
Point,  Lake  Superior,  1. 

4ii.  M.  llliK'idllH  II.  s|>. — Form  moih'iatcly  sit'iidiT.  l'iih<'HC(!iic(>  very 
niiort,  tiiii',  Nimrst",  rt'ciirnhfiit,  ciiu'rcoiin,  Kcnrt'dy  visilih-.  Head  rohiist, 
srarci'ly  twice  as  wIiIh  an  loiij;  ;  intcroculnr  «iirfacn  twii:t>  ah  wide  ax  tho  cyt', 
iiioilitratt'ly  cxoavatt'd,  equally  trilolii^d  hy  tho  I'ouiidfd,  but  coiiHiiiciioiis  sul- 
calions  ;  iiiti-iini'diati'  smlaff  I'Vi'iiiy  and  rather  stroiifiiy  cdiivex  ;  imiietiires 
ratiier  coar.io,  ^l();^t•,  and  evenly  distrilnited  ;  oeiilar  lines  meetinj;  at  one 
leiij^th  in  advanco  ;  antennae  slenih-r,  longer  than  tins  widtli  of  head,  tlrMt 
joint  lilack,  remainder  dark  pieeoiis-hrown,  eliili  distinct  ;  third  Joint  oiie- 
tliinl  as  loi:<^  a^'ain  as  the  I'oiirth,  I'oiirth  and  tilth  siil)-e(|iial,  sixth  anil 
si'venth  eiiiial  in  length,  the  latter  tliieker,  eighth  slightly  longer  than  wide, 
joints  of  cliih  iinifornily  increasing  in  length  and  tliiekness  ;  maxillary  palpi 
]iiceous-hro\vn,  tirst  joint  llavo-testaceoiis.  Prothorax  rcdaist,  widest  just 
hefore  tliH  middle,  where  it  is  four-llftlis  as  wide  as  the  head,  and  ahont  as 
hroad  as  long ;  sides  theiictt  very  moderately  convergent  posteriorly  and 
iii'ai'ly  straight;  anterior  and  jiosterior  margins  eijiial  in  length,  the  former 
niiii'li  the  more  arcuate  ;  slirlace  feehly  tiiherciilate  along  the  sides,  especially 
towaiil  the  base,  very  closely,  rather  liiiely  and  somewhat  uviMily  jmnctate; 
canaliciilntion  very  obscure,  being  merely  a  slight,  irregular  erosion,  coni- 
nieiicing  liefore  the  middle,  one-third  as  long  as  the  i>ronotiini.  Elytra  at 
base  just  perceptibly  narrower  than  tlu^  head  ;  sides  rather  strongly  diver- 
gent posteriorly,  very  feebly  arcuate,  equal  in  length  to  the  width  at  base  ; 
together  broa<lly,  rather  strongly  and  triangularly  (>m,'irginate  liehind  ;  suture 
slightly  longer  than  the  pi(Uiotmii  ;  surtjUH' somewhat  depressed,  nearly  even, 
coarsely,  closely,  irregularly,  and  sub-vai  iolately  punctured  ;  punctures  more 
isolated  near  the  inner  basal  angles.  Abdominal  segments  decreasing  uni- 
fonnly  and  somewhat  ra)>idiy  in  width,  lirst  a  little  narrower  than  the  con- 
tiguous elytra  ;  surface  broaiily  convex,  rather  coarsely,  closely,  and  evenly 
]>unctulate;  transv(M'se  oarinae  tricuspid,  lateral  cusps  short,  broad,  and 
nidiiiientary,  middle  long,  finely  aciculate,  conspicuous.  Legs  rather  sliort 
and  robust,  fuscous,  under  sides  of  femora  nearly  rufous  ;  tirst  joint  of  jioste- 
rior  tarsi  two-thirds  as  long  again  as  tlm  second,  as  long  as  the  last,  second 
distin<'tly  longer  than  the  third. 

.!/((/('. — Posterior  edge  of  the  fifth  ventral  segment  just  jierceptibly  iiicur- 
vate  in  the  middle  ;  sixth  segment  feebly  sinuate  at  apex,  sinus  rather  broad 
and  extremely  feeble. 

hamuli'. — Sixth  ventral  segment  evenly  rounded  behind. 

Length  2.r)-2.7  mm. 

Detroit,  Michigan,  !). 

riie  sexual  characters  of  this  species  are  very  f'eeh'      but  still  of 
such  a  nature  as  to  be  almost  unmistakable  ;   the  sixth  segment  is 
Stenini.  5 


t  i      I 
\J     .1 


\        \ 


n 


m 


66 


NOUTII    AMEKICAN 


ratlier  narrow,  .'iihI  i  ■  tnim-atcd  ratlicr  broadly  at  tlio  tip,  witli  tlie 
side  angle.-!  rounded,  and  the  tiuiu-i.tion  slightly  incurvate  in  the 
middle. 

Then!  is  before  me  a  speeime.n  from  IMarrpiotte,  INIichigan,  which  I 
have  referred  to  this  s|)ecies,  althougii  it  presents  a  slightly  diH'erent 
facies,  and  is  ratlier  more  slender. 

47.  S.  ineiiila.X  n.  sp. — Form  ratlicr  .silcndfr.  Pnlx'soenpo  as  in  iiulitjcns, 
but  loiii^^cr  iiiid  more  rccmiibeiit  on  thu  alxlonii'n.  Head  ratlier  rol)iist,  twice 
as  wide  as  loii^  ;  interocular  surface  iiiodeiately  depressed,  very  linely,  inoder- 
jitely  sparsely,  and  ratlier  evenly  punctate,  interspaces  very  tlat,  rather 
lustrous  ;  lonj^itudinal  elevation  distinctly  narrower  tlian  the  lateral  por- 
tions, evenly  and  strongly  convex,  prominent,  summit  narrowly  impunctate; 
ocular  lines  meeting  at  nearly  two  lengths  iu  advance  ;  lirst  joint  of  antennae 
black,  second  dark  jiiceous-brown  :  lirst  joint  of  maxillary  palpi  and  base  of 
the  second  ]>ale  testaceu.-,,  i-'Uiaimler  piceous,  third  joint  not  greatly  exceed- 
ing the  second  in  length.  Prothorax  widest  at  the  middle,  where  it  is  three- 
fourths  as  wide  as  the  head,  and  about  as  wid(!  as  long  ;  sides  tlience  equally 
convergent  anteriorly  and  posteriorly,  and  nearly  straight;  anterior  and 
posterior  margins  equal  in  length,  the  fornu'r  strongly  arcuate,  the  latter 
straight;  surface  rather  strongly  tuberculate  near  each  basal  angle,  trans- 
verscdy  and  feelily  ini])ressed  just  behind  the  anterior  margin,  finely,  rather 
closely  and  somewhat  irregularly  juuictate  ;  punctures  more  isolated  at  the 
middle,  interspaces  highly  polished,  flattened  ;  canaliculation  in  the  form  of 
a  very  faint  and  just  perceptible  longitudinal  erosion.  Elytra  at  base  some- 
what narrower  than  the  head  ;  si<les  rather  strongly  div(!rgeiit  posteriorly, 
slightly  longer  than  the  width  at  base  and  very  feebly  arcuate;  together 
roundly  and  rather  strongly  emarginate  behind  ;  surface  depressed,  feebly 
and  broadly  impressed  along  the  suture,  very  closely  punctate,  punctures 
growing  more  coarse  and  conlluent  toward  the  apices.  Abdominal  segments 
decreasing  rather  uniformly  and  gradually  in  width,  first  scarcely  as  wide  as 
the  contiguous  elytra;  surface  broadly  convex,  coarsely,  closely,  and  evenly 
punctulate,  more  linely  so  toward  the  tip  ;  transverse  carinae  tricusjiid,  mid- 
dle cusps  line  and  aciculate,  lateral  sliorti:r  and  bifurcate.  Legs  mo<lerate, 
rather  pale  fuscous  ;  first  joint  of  the  posterior  tarsi  three-tifths  as  long  again 
as  th(!  second,  and  somewhat  shorter  than  the  last,  second  joint  nearly  as 
long  as  the  third  and  fourth  together. 

AJitle. — Unknown. 

Fciiuilf.. — iSixth  ventral  segment  somewhat  acutely  and  very  evenly  rounded 
behind. 

Length  2.4  mm. 

Cambridge,  Massachusetts,  1. 

The  antennae  are  missing  with  exception  of  the  first  two  joints. 

Ill  this  particular  portion  of  the  genus  the  specific  differences 
become  very  slight  and  somewhat  uncertain ;  without  previous  study 
and  long-continued  observation  the  species  might  be  pronounced  in 
some  instances  identical.     The  specimens  combined  in  eriensis  and 


COLEOPTERA. 


67 


i 


th  tlie 
in  the 

vhWh  I 
ittfreiit 


ist,  twice 
r,  inoiler- 
t,  rather 
eral  por- 
nuictute ; 
iiiiti'iinae 
1(1  l)ase  of 
ly  «xci'e<l- 
t  it;  tlivee- 
ce  equally 
Ifvior   and 
till-  laltor 
glu,  traiis- 
oly,  rather 
Ui'il  at  the 
the  t'onn  of 
hast'  some- 
[Mtsteriorly, 
together 
,sea,  feehly 
puiietures 
al  segments 
■IS  wiih^  as 
and  (evenly 
nsi>id,  n>id- 
s  moderate, 
htng  again 
i\t  nearly  as 


nlv  rounded 


,'0  joints. 

(lifft'i-ences 
■vious  study 
)nounc('il  in 
eriensis  untl 


jildcldus  wore  at  first  described  as  tlirec  or  lour  distinct  species,  and 
I  liave  suppressed  all  but  those  here  given  in  order  to  satisfy  my  mind 
more  completely  of  the  validity  of  at  least  these  typical  representa- 
tives. The  series  of  specimens  are  scarcely  large  enough  to  admit  of 
con(dusive  judgment,  but  I  am  almost  convinced  that  I  have  under- 
stated the  number  of  species. 

4s.  S.  erieiisis  n.  sp. — Form  as  in  jilaridiiK.  Puheseence  short,  fine, 
senii-ereet,  s('tiforni,  ratlier  sparse,  cinereous,  coarser  and  longer  on  tiie 
elytra  than  on  the  ])rothorax  and  head.  Head  rohust,  twice;  as  wide  as  long  ; 
interocnlar  surfaoe  twice  as  wide  as  the  eye,  nearly  Hat,  liiiely,  very  closely 
and  rather  evenly  pinictate  ;  punctures  more  distant  along  the  middle ; 
longitudinal  elevation  as  wide  as  latera'  portions,  broadly  and  feehly  con- 
vex ;  ocular  lines  meeting  at  one  lengtli  in  advance  ;  antennae  slender,  dark 
piceous,  basal  joint  black,  club  moderate  ;  third  joint  oncvthird  as  long  again 
as  the  fourth,  fourth  and  fifth  equal,  sixth  somewhat  longer  and  narrower 
than  the  seventh,  eighth  very  slightly  elongate,  as  wide  as  the  seventh, 
middle;  joint  of  club  widest ;  maxillary  palpi  jiiceous,  first  joint  much  paler, 
Prothorax  robust,  widest  at  onevhalf  the  length  posteriorly,  where  it  is  four- 
liitlis  as  wide  as  the  head,  and  very  slightly  narrower  than  long  ;  sides  thence 
moderately  convergent  and  straight  ;  anterior  margin  longer  than  posterior, 
(Mjually  arcuate;  surface  somewhat  tuberculate  at  the  siiles,  finely,  closely, 
and  (Evenly  punctate,  Interspaces  one-third  as  wide  as  the  punctures,  very 
convex,  polished  ;  canaliculation  just  visihle  as  an  irregular  and  short  erosion 
of  tht;  surface  just  behind  the  middle.  Elytra  at  base  as  wide  as  the  head  ; 
sides  very  moderately  divergent  posteriorly,  very  slightly  longer  than  the 
width  at  base  and  feebly  aroiate  ;  together  broailly  and  vtu'y  fe(d)ly  emargi- 
nato  behind  ;  suture  nearly  one-fifth  as  long  again  as  the  pronotum  ;  surface 
V(>ry  feebly  impressed  along  the  suture,  rather  coarsely,  very  closely,  deeply, 
and  somewhat  irregularly  punctate  ;  punctures  in  contact  longitudinally 
hcliind  and  near  the  suture,  sometinu's  isolated  anteriorly.  Abdominal 
segments  decreasing  uniformly  and  (juite  rapidly  in  width,  first  as  wide  as 
the  contiguous  elytra  ;  surface  broadly  convex,  rather  coarsely  and  irregu- 
larly punctulate,  more  distantly  so  in  the  middle  of  the  segments,  and  more 
finely  toward  the  vertex  ;  transverse  carinae  tricuspid,  unddle  cusjjs  long 
and  finely  aciculate,  lateral  very  small,  distant,  and  rudimentary.  Legs 
nuiderate,  dark  piceous-brown  ;  first  joint  of  the  posterior  tarsi  four-flfths  as 
long  again  as  the  second,  as  long  as  the  next  two  together,  last  joint  ni-.ich 
longer  than  the  first,  as  long  as  the  second,  third  and  fourth  t()gether.  Under 
surface  of  the  abdomen  dark  piceous,  finely  punctulate.     Body  winged. 

Male. — Posterior  edge  of  the  fourth  ventral  segment  emarginate  in  its 
middh;  third,  emargination  evenly  rounded  and  just  perceptible,  contiguous 
surface  flattened  and  bordered  with  long  setae;  fifth  se'"nent  emarginate  in 
its  middle  fourth  at  apex,  emargination  very  evenly  rounded,  five  to  six  times 
as  wide  as  deep,  contiguous  surface  flattened  and  horder(>(l  with  long  setae  • 
sixth  segment  sinuate  at  apex,  sinus  slu'.rply  rounded,  twice  as  wide  as  deep, 
sinus  and  vertices  ecpial  in  extent. 

Femule. — Unknown. 

Length  2.4-2.6  mm. 


1. 


(J8 


NORTH    AMERICAN 


Detroit,  ^licliijian,  .'3. 

Botli  tcniniiiil  joints  of  tlie  antennae  in  the  above  type  specimen 
are  (U'e|)ly  indented  almost  tiiroiigiiout  tiieir  lenjitli  and  breadth 
below,  but  I  can  find  no  sign  oF  such  a  malformation  in  the  other 
specimens.  This  sjx'cies  is  quite  distinct  from  these  which  most 
resemble  it,  in  the  elongated  terminal  joint  of  the  tarsi. 


49.  S,  sphacrops  n.  S]). — Form  moderately  slender.  Pubesccnico  rather 
long,  reciimlieiit,  elose,  and  abnndant  on  the  abdomen,  much  more  sjiarse  on 
the  remainder  of  the  upper  siirfa(.'e,  llavo-cinereous.  Head  larg(^,  more  than 
twice  as  widt*  as  long;  interoeular  surface  twiee  as  wide  as  the  eye,  iieaily 
tlat,  finely  sub-variolately,  rather  elosely  and  evenly  punctate;  longitudinal 
elevation  wider  than  lateral  ijortions,  evenly  convex  and  distinct;  ocular 
lines  meeting  at  three  to  four  lengtlis  in  advance  :  anttmnae  slender,  much 
longer  than  the  width  of  head,  piceous-hlaek,  paler  toward  the  tip,  dub 
moderate,  slender  ;  joints  thi'e(!  to  seven  much  elongated,  third  joint  one- 
third  as  long  again  as  the  fourth,  fourth  and  fifth  sul)-e(iual,  sixth  and 
seventh  sub-eijual  in  length,  shorter,  the  latt(>r  slightly  thicker,  eighth 
three  times  as  long  as  wide,  joints  of  club  elongated,  increasing  in  length  ; 
maxillary  palpi  long  and  slender,  piceous-black  throughout.  Prothorax 
widest  at  the  nuddle,  where  it  is  two-thirds  as  wide  as  the  luvad,  and  dis- 
tinctly narrower  than  huig  ;  sides  thence  moderately  convergent  posteriorly 
and  feebly  sinuat(>  ;  anterior  margin  slightly  longer  and  more  arcuate  tbau 
the  posterior  ;  surface  rather  strongly  tuberculate  along  the  sides  toward 
the  base,  liuely,  very  closely,  deeply,  and  irregularly  punctate;  punctures 
crowded  and  transversely  elongated  near  the  margins,  often  widely  isolated 
near  the  middle,  along  the  middle  throughout  the  entire  length  there  is  a 
narrow  line  sunken  sliglitly  l)etow  the  gi^neral  surface,  from  which  the  imnc- 
tures  seem  to  stream  out.  Elytra  at  base  distinctly  narrower  than  the  head  : 
sides  feebly  divergent  posteriorly,  equal  in  length  to  the  width  at  base,  very 
feebly  arcuate,  mort;  so  posteriorly  ;  togethtu-  broadly  and  feebly  emarginate 
behind;  suture  equal  in  length  to  the  i)ronotum  ;  surface  rather  coarsely, 
very  deeply,  closely,  and  somewhat  irregularly  punctate,  interspaces  very 
convex,  highly  ]iolished.  Abdominal  segnients  decreasing  uniformly  and 
rather  gradually  in  width,  fir.st  sonunvliat  narrower  than  the  contiguous 
elytra  ;  surface  feebly  convex,  rather  finely,  closely,  and  evenly  punctulate  ; 
transverse  carinae  strongly  arcuate  posteriorly,  4-cuspid,  cusps  very  tine, 
rather  approximate,  aciculate,  more  coarsely  so  on  the  first  two  segments. 
Legs  long  and  slender,  fuscous,  excei)t  the  under  surfaces  of  the  femora, 
which  are  rufous;  (ir-it  joint  of  the  posterior  tarsi  two-thirds  as  long  again  as 
the  second,  as  long  as  the  second  and  third  together,  and  somewhat  longer 
than  the  lifth,  joints  two  to  four  uniformly  and  gradually  decreasing  in 
length. 

Male. — Posterior  edge  of  the  fourth  ventral  segment  emarginate  in  its 
middle  third,  emargination  evenly  rounding  and  just  perc<>ptible,  contiguous 
surface  tlattened  anteriorly  ;  fifth  segment  emarginate  in  its  mi<idle  third  at 
apex,  emargination  rather  strong,  evenly  rounded,  and  six  times  as  wide  as 


COLEOPTEKA. 


69 


(Ici']),  coiitigiKiiis  snrt'aec  ll.attciu'il,  or  very  fccMy  and  (lyliiidrically  iiuiii'i'ssnd 
tlifoiifjliotit  aiitiii-iiu'ly  ;  sixtli  si'giiH'iit  deeply  sinuate  at  api'x,  sinus  evc^nly 
idiiiidiug,  three  times  as  wide  as  deej),  liaving  iieai'ly  tlie  same  curvatui-e  as 
tlie  apices  ;  seveiitli  segment  feebly  i  luarginate  at  tip. 

Fi'iiuilc. — Unknown. 

Length  4.0  nnn. 

Tynirsboroiijfli,  Massacliusottf!,  1. 

Tills  fine  s|)ee,ii's  Is  VL-ry  distiiu!!  ;  the  oyos  are  very  larjie  and  (con- 
vex ;  the  abilonien  is  covered  densely  beueatii  with  very  long,  fine, 
piceoiis  pubescence. 


."JO.  S.  militaris  n.  sp. — Form  moihirately  robust.  l'uh(>scenoe  short, 
fine,  suh-reeumlieiit,  s[iarse,  setiform,  and  cinereous.  Head  moderate,  more 
tlian  twiec!  as  wide  as  long ;  interoeular  surfact;  slightly  convex,  nearly  three 
times  as  wide  as  the  eye,  coarsely,  very  closely,  variolately,  and  evenly 
punctate;  longitudinal  elevation  wider  than  the  lateral  portions,  rather 
acutely  convex  and  moderately  prominent  ;  ocular  lines  meeting  at  nearly 
three  Ic'ugths  in  advance:  antennae  very  slightly  longer  than  tlu^  widtli  of 
head,  bla(;k,  club  large;  third  joint  one-half  as  long  again  as  the  fourth., 
joints  four  to  seven  decreasing  uniforndy  and  very  slowly  in  length,  eighth 
slightly  elongated,  regularly  oval,  joints  of  club  increasing  in  huigth  and 
thickness,  last  nearly  as  long  as  the  ninth  and  tenth  together;  maxillary 
palpi  short,  piceous-black,  first  joint  very  slightly  paler.  Prothorax  robust, 
widest  at  the  middle,  where  it  is  four-fifths  as  wid(!  as  the  head  and  just 
perceptibly  narrower  than  long  ;  sides  thence  equally  convergent  iinteriorly 
and  posteriorly,  and  nearly  straight ;  anterior  and  posterior  margins  e(|ual  in 
length,  the  former  slightly  the  more  arcuate  ;  surface  transversely  and  very 
faintly  impressed  just  behind  the  apical  margin,  and  feebly  tuberculate  at 
the  sides  near  the  base,  finely,  very  closely,  souKiwhat  regularly  and  sub- 
variolately  punctured  ;  canaliculati  )n  in  the  form  of  a  mere  erosion  in  the 
middle,  on(!-half  as  long  as  the  pronotum,  and  very  difficult  of  (diseivation. 
Elytra  at  base  very  slightly  narrower  than  the  head  ;  sides  feebly  divergent 
posteriorly,  slightly  longer  than  the  width  at  base,  feebly  arcuate  ;  together 
briia<lly  and  distinctly  emarginate  behind  ;  suture  one-seventh  as  long  again 
as  the  pronotum  ;  surface  faintly  impressed  along  the  suture  and  feebly 
tuliercuilate  near  the  middle  of  each  elytron,  rather  coarsely,  closely,  and 
irregularly  piinctUK^d,  punctures  rather  deeply  impress<!d,  interspaces  geni>- 
rally  une-fouith  as  wide  as  the  punctures,  convex,  p(dished.  Abdominal 
segments  decreasing  uniformly  and  rather  rapidly  in  width,  first  as  wide  as 
the  c(nitiguous  elytra  ;  surface  broadly  convi'X,  coarsely  and  distantly  jinnc- 
tulate,  iiiucli  more  fiiudy  and  closely  so  toward  the  tip  ;  transverse  carina'e 
4-cuspid,  cusps  closely  approximate,  short,  equal,  and  stout.  Legs  robust, 
black  above,  piceous-black  beneath  ;  first  joint  of  the  posterior  tarsi  two- 
thirds  as  long  again  as  the  second,  longer  than  the  next  two  together,  and 
somewhat  shorter  than  the  last,  tiiiid  and  fourth  sub-e(iual.  Under  surface 
of  abdomen  coarsely  and  closely  punctiilate,  densely  clothed  with  long, 
coarse,  cinereous  sv'tae,  which  are  nearly  recumbent. 


m 


■fT^r^ 


(0 


NOirni    AMKKICAX 


:  ill 


:i| 


Mall!. — Posterior  odgo  of  the  lifth  vcntriil  scgmont  (nuarjiinato  in  its  iiiid- 
rlle  half,  cmargiuatiou  tiveiily  romidtMl  ami  just  |)('rct'i>til)li' ;  sixtli  scgiiKMit 
broadly  siiiiirite  iit  apox,  sinus  very  wide,  somewhat  auiitely  rounded  at  the 
hottom,  and  eight  times  as  wide  as  d'.ep. 

Ftinule. — Sixth  segment  evenly  rounded  behind. 

Length  '1J>  mm. 

Biitcliehwiiuunp;  I5ay,  Liike  Superior,  "2. 

."jl.  S.  plllto  n.  sp. — Form  robust.  I'ubeseence  very  short  and  sparse, 
sub-reciimlient,  pale  llavo-einereoiis.  Head  very  small,  slightly  more  tiian 
twice  as  wide  as  long  ;  interoeular  surfaeti  distinctly  convex,  more  than 
twice  as  wide  as  the  eye  ;  longitudinal  elevation  wider  than  the  lateral  por- 
tions, fe(d)ly  convex;  suleations  feelile,  punctures  coarse,  rounded,  evenly 
distril)ut(Ml,  interspaces  nearly  one-half  as  wid<'  as  the  punctures,  very  con- 
vex, polished  ;  ocular  lines  meeting  at  somtwhat  less  than  two  lengths  in 
advance;  antennae  distinctly  longer  tlian  the  width  of  head,  robust,  club 
distinct,  tirst  and  second  joints  nearly  black,  remainder  rather  dark  piceous- 
brown  ;  third,  fourth,  and  fifth  joints  uniformly  and  rapidly  decreasing  in 
length,  sixth  and  seventh  abruptly  shorter,  equal  in  length,  cordate,  the 
lattei-  slightly  thicker,  eighth  as  thick  as  the  seventh,  glohular,  joints  of  club 
increasing  rapidly  in  length  and  thickness  ;  maxillary  i)alpi  rather  short 
an<l  rohust,  piceous-black,  first  joint  rather  pale  jiiceo-testaceous.  Prothorax 
widest  slightly  before  the  middle,  wiiere  it  is  very  slightly  narrowiu'  than 
the  head  and  distinctly  narrower  than  long  ;  sides  thence  feebly  convergent 
posteriorly  and  nearly  straight ;  anterior  and  posterior  margins  sub-equal  in 
length,  the  former  slightly  the  more  arcuate? ;  surface  rather  strongly  tuber- 
culate  imar  the  basal  angles,  more  convex  in  the  middle,  closely,  very  finely, 
deeply,  and  irregularly  punctate  ;  canaliculation  narrow,  somewhat  distinct, 
terminating  at  equal  distances  from  the  base  and  ap(^x,  nearly  three-fourths 
as  hing  as  the  pronotuin.  Elytra  at  base  much  widtu-  than  the  heail  ;  sides 
feebly  divergent  posteriorly,  slightly  longer  than  the  width  at  base,  and 
strongly  arcuate  ;  together  roundly  and  somewhat  feebly  emarginate  behind  ; 
sutur(!  nearly  one-fourth  as  long  again  as  the  pronotum  ;  surface  narrowly 
and  feebly  impressed  along  the  suture,  deeply,  very  closely,  rather  finely  and 
exceedingly  irregularly  channtded,  interspaces  convex  and  highly  polished. 
AbdonVTir*'  segments  decreasing  very  nniforndy  and  rather  I'apidly  in  width, 
first  slightly  narrower  than  the  contiguous  elytr.i ;  surface  polished,  finely 
and  sparsely  punctulate  ;  transverse  carinae  4-cuspid,  cusps  (Miual  in  length, 
equidistant,  ratlnu'  long,  fine  and  generally  enlarged  slightly  at  the  tips. 
Legs  slender,  i)iceous-black  ;  first  joint  of  the  posterior  tarsi  short,  four- 
fifths  as  long  again  as  the  second,  distinctly  shortta-  than  the  fifth,  second 
and  t'  <rd  equal,  fourth  slightly  shorter,  as  wide  as  long  ;  tarsi  nearly  cylin- 
drical I  i'loughout. 

Mule. — Posterior  edge  of  the  fifth  ventral  segment  just  perceptibly  emargi- 
nate in  the  middle  ;  sixth  segment  very  broad  at  apex,  where  it  is  broadly 
sinuate,  sinus  occnjiying  nearly  the  entire  segmental  apex,  evenly  roumled, 
and  about  eight  times  as  wide  as  deep ;  seventh  broad  and  truncate  at  tip, 
lateral  setae  moderat(dy  developed. 

/Vhkj/p.— Sixth  segment  very  broad,  evenly  rounded  behind. 

Length  2.7-2.8  una. 


him 

fV 

fe 

dec 

row 

.lis 

sh, 

and 

first 

sllCJI' 

.1/1 


fiftl 

tig  I 
at  a 
abou 
trun 

/; 

L 


?'5l  I  ■  I,' 


COLEOPTERA. 


71 


r;iml)r'nl,u;(',  Ariissaclmsctts,  ,1, 

This  species  is  reiulily  distiiignislied  by  tlie   larsjil  structure,  uiul 
th«  very  irregular  channeled  sculpture  of  the  elytra. 


ri'i.  S.  iiicultlis  n.  sj). — Form  nioiicratcly  slciulcr.  I'uliescence  rather 
long,  closo,  rnciiiiil)(Mit,  cinort'ous,  very  conspicuous  on  tlie  ■•ilxloiuen.  Head 
ratlior  small,  twice  as  wide  as  long;  interocular  surface  scarcely  twice  as  wide 
as  the  eye,  just  i)erce])til)ly  d<'pressod  ;  almost  'Hjually  trilobed  by  the  very 
indistinct  sidcations  ;  intermediate  surface  very  feebly  ccnivex,  jinnctures 
nioderattdy  coarse,  rather  close  and  even,  occasionally  coalescent  in  twos  or 
threes  ;  ocular  lines  meeting  at  one  length  in  advance  ;  antennae  much  longer 
than  the  width  of  head,  black,  slen<ler,  club  moderate  and  rather  densely 
cIoUkmI  with  short  cinereous  j)ubescence  ;  third  joint  omvthird  as  long  I'gain 
as  th(!  fonrtli,  fourth  and  fifth  ecpial,  sixth  and  seventh  joints  but  little 
shorter,  the  latter  very  slightly  the  shorter  and  thinker,  eighth  feebly  (don- 
gated,  slightly  thick<'r  tlian  the  seventh,  ovoidal,  joints  of  tduli  imtreasing 
uniforndy  and  very  gradually  in  length  and  thickness;  niaxilliiry  palpi 
moderate  in  length,  piceons-black  tbrougbont  :  labrum  narrow  ami  very 
strongly'  arcuate  ant<'riorly.  Prothorax  vei-y  gi'ailtially  and  arcuately  widen- 
ing to  a  point  just  in  advance  of  the  middle,  where  it  is  fonr-flftlis  as  wide  as 
the  head,  and  nearly  one-sixth  narrower  than  long;  sides  thence  moderately 
convergent  and  very  fe(d)ly  sinuate  ;  ant<'rior  margin  distinctly  longer  than 
the  ]M)st<'rior,  equally  arcuate  ;  surface  almost  evenly  convex,  rather  limdy, 
feebly,  closely,  coalescently,  and  somewhat  confusedly  jiunctate  ;  canalicula- 
tion  in  tlu'  form  of  a  narrow,  indistimitly  outlined,  shallow  erosion,  extending 
nearly  to  the  margin.  Elytra  at  base  just  perceptilily  wider  than  the  head; 
sides  almost  parallel,  slightly  longer  than  the  width  at  liase,  ratluM-  strongly 
and  evenly  arcuate;  togetlier  broadly  and  ratlier  strongly  emarginat(!  he- 
hind  ;  suture  about  one-eighth  as  long  again  as  the  pronotum  ;  surface  very 
feebly  imi)r(>ssed  on  thc^  suture  at  the  base,  rather  finely,  v(>rv  closely,  rather 
fcel)ly,  and  very  confnseclly  punctured  and  chaiiinded.  Abdominal  segments 
decreasing  uniformly  and  very  gradually  in  width,  first  very  slightly  nar- 
rower than  the  contiguous  elytra  ;  siirfa<!e  moderately  conv<'x,  linely,  rather 
distantly,  and  evenly  puiictulate  ;  traiisverse  carinae  4-cus]iid,  middle  cusps 
short,  fine,  and  acicnlate,  lateral  broader  and  acuminate.  Legs  rather  long 
and  slender,  black,  rather  densely  clothed  with  short  cinereous  jmbescemce ; 
first  joint  of  tlu!  posterior  tarsi  one-half  as  long  again  as  the  second,  distinctly 
shorter  than  the  last,  second  nearly  one-half  as  long  again  as  the  third. 

.\fiile. — Fifth  ventral  segment  very  fe(d)ly  emarginate  in  its  middle  three- 
fifths  at  apex,  emargination  evenly  rounded,  and  scarcidy  measurable,  con- 
tiguous surface  normally  convex  ;  sixth  segment  broadly  and  feebly  sinuate 
at  apex,  sinus  nearly  as  broad  as  the  entire  segment,  very  evenly  rounded, 
about  ten  times  as  wide  as  deep  ;  seventh  segment  narrow  and  almost  squarely 
truncate  at  the  apex,  teeth  very  small,  acute. 

Fimule. — Unknown. 

Length  3.1  mm. 

Arizona,  1. 


-:»»«» ..u,^.^^. 


72 


NOUTII    AAIKRICAX 


%    " 


r)3.  S.  pterobrncliyH  fi.  and  II. — Form  niodi'i-ati^ly  slt-iidcr.  I'libcs- 
ccucu  very  line,  long,  sparse,  and  riMMinilu'iit,  (.•iiii'rciius.  Head  large,  sliglitly 
movo.  than  twice  as  wide  as  long  ;  interiiinilar  surface  flat  near  the?  eves,  not 
twice  as  wide  as  tlie  eye,  (iiwly,  vai'idlately,  and  coniewliat  distantly  imnctate 
near  the  eyes,  wlioUy  ini])unetat(?  in  the  middle  third;  longitudinal  eleva- 
tion wider  than  the  lateral  jiortions,  evenly  and  very  strongly  eonvex,  very 
promin(!nt ;  ocnlar  lines  meeting  at  one  length  in  advance  ;  antennae  scarcely 
longer  than  the  width  of  head,  slender,  tlavate,  last  two  joints  infuscate, 
chill  moderate;  third  j<iint  one-half  as  long  again  as  the  fourth,  fourth  and 
fifth  equal,  eighth  suli-gloliular ;  maxillary  jialpi  flavate,  last  joint  very 
slender.  Prothorax  very  rolinst,  widest  very  slightly  before  the  middle, 
where  it  is  four-tifclis  as  wide  as  tlie  head,  and  as  hroad  as  long;  sides 
thence  very  moderately  converg(^nt  jiosteriorly  and  nearly  straight ;  anterior 
margin  slightly  longer  and  more  evenly  rounded  than  the  posterior  ;  surface 
very  faintly  tuberculatt'  at  the  sides  m'ar  the  base,  minutely,  feidily,  dis- 
tantly, and  (^'enly  jiunctatc^ ;  canaliculation  fusit'orni,  d<M>i)ly  impressed,  two- 
thirds  as  long  as  the  pronotum,  terminating  near  the  posterior  margin. 
Elytra  at  base  narrower  than  the  head  ;  sides  strongly  divergent  [)osteriorly 
and  very  strongly  arcuate,  as  long  as  the  width  at  l)ase  ;  together  broadly 
and  ratluir  strongly  emarginate  behind  ;  suturi^  distinctly  sliorter  than  tlu> 
pronotum  ;  surface  broailly  and  feebly  impressed  along  the  suture,  very 
feebly  and  somewliat  distantly,  but  confusedly  punctured.  Abdominal  seg- 
ments decreasing  uniforndy,  but  very  gi'adualiy  in  width,  first  as  wide  as 
the  c(^ntiguous  elytra;  surface  broadly  convi'x,  teelily  and  rather  distantly 
puuctulate  ;  transversi;  cai'inae  not  cusped.  Legs  moderate,  llavate  through- 
out ;  first  joint  of  th(!  jiosterior  tarsi  tu  ici^  as  long  as  the  second,  and  as  long 
as  the  next  three  together,  last  joint  very  short. 

Male. — Unknown. 

Female. — Sixth  v<'ntral  segment  acutely  produced  at  apex,  cusp  prominent. 

Length  2.4-2.7  mm. 

Alaska,  2. 

This  is  the  S.  hrevipeniu's,  of  ^liikliii,  and  is  so  distinct  tiiat, 
altlioiigii  I  liave  been  unable  to  describe  tlie  male  cliaracters,  its 
ideiititication  will  always  be  very  easy. 

■')4.  S.  COrvilS  n.  sp.  (Schwarz  MS.). — Form  rather  robust.  Pubescence 
very  short,  sjiarse,  sub-erect,  rather  coarse,  jticeo-cinereous  ;  flavate  on  the 
abdomen,  where  it  is  much  more  dense  toward  tlie  margins.  Head  moderate, 
robust,  twice  as  wide  as  long;  interocular  snrface  three  times  as  wide  as  the 
eye,  very  modi>rately  depressed,  nearly  equally  trilobed  by  the  longitudinal 
sulcations,  which  are  rather  feeble  ;  intermediate  surfaci!  rather  feebly  con- 
vex ;  punctures  extremely  close  and  confused,  surface  evenly  though  coarsely 
roughened,  lustreless  ;  ocular  lines  meeting  at  somewhat  more  than  one 
length  in  advance,  strongly  curvate  anteriorly ;  eyes  narrow  ;  antennae 
slightly  longer  than  the  width  of  head,  slender,  club  large,  basal  joint 
black,  second  somewhat  ])aler,  remainder  piceous-brown  ;  third  joint  one- 
third  as  long  again  as  the  fourth,  fourth  and  fifth  equal,  sixth  and  seventh 


!'-f(; 


COLEOl'TKKA. 


73 


<'(jual  in  k'lij^tli,  the  latter  much  tlie  tliic-kcr,  (lijihtli  sli<,'litly  loii;,'i'r  than 
wide,  Hlightly  cordate,  and  jtiat  perceptibly  narrower  than  the. seventh,  joints 
of  clnl)  incn-.'isiiig  in  leiii,'th,  ninth  small,  tenth  much  the  hroadest  ;  maxil- 
lary paliii  (lark  j)ici;(iMs-bro\vn,  lirst  joint  diuk  ))iciM)-tcstacc(ius.  Prothorax 
arcuately,  evenly,  and  vtu-y  gradually  increasing  in  width  to  the  middle, 
where  it  it*  seven-eighths  as  wide  as  the  head  and  distinctly  narrower  than 
long;  sides  thence  feebly  convergent  posteriorly  and  feebly  sinuate  ;  auteiior 
margin  slightly  longer  than  the  posterior,  (Hjually  arcuate ;  surface  trans- 
vers(dy  and  feebly  impresseil  just  behind  the  apex,  finely,  extremely  closely, 
confusedly,  and  very  deeply  sculptured,  inteispaccs  acute  and  lustreless  ; 
canaliculation  narrow,  slight,  beginning  at  the  middle,  nearly  one-third  as 
long  as  the  i)ronotuni.  Elytra  at  base  slightly  wider  than  the  head  ;  sid(\s 
feebly  divergent  posteriorly,  longer  than  the  width  at  base,  and  nearly 
straight,  except  toward  the  ai>ici's  where  they  an^  feebly  arcuate  ;  together 
very  narrowly  and  strongly  emarginate  behind  ;  suture  nearly  one-thinl  as 
long  again  as  the  pronotum  ;  surface  rather  finely,  very  deeply,  extremely 
closely,  and  irregularly  channeled,  interspaces  acute.  Abdominal  si-gments 
decieasing  uniforndy  and  rather  rajiidly  in  wi<lth,  first  slightly  narrower 
than  the  contiguous  elytra  ;  surfaci;  very  coarsely,  feebly,  closely,  and  evenly 
jiunctulate;  transverse  carinac  not  cusjied,  sometimes  sex- or  poly-dentate, 
teeth  small  and  acute.  Legs  long  and  slender,  i)iceous- lilack,  tarsi  very 
long  and  sh^nder,  paler  ;  first  joint  of  |)iisterior  tarsi  three-fourths  as  long 
again  as  the  second,  longer  than  the  liftli,  joints  two  to  four  uniforndy  and 
rajjidly  decreasing  in  length,  lifth  as  long  as  the  thiid  and  fourth  together. 

Mule. — Fifth  ventral  segnnuit  very  fe(d)ly  emarginate  in  the  middle,  curve 
just  perceptible  and  very  short ;  sixth  segment  truncate  at  tip. 

luiiiiile. — Sixth  segment  narrowly,  strongly,  and  triangularly  produced  at 
apex. 

Length  3.2-3.(J  mm. 

Liiko  Labiu^ln,',  15ritisli  Columbiii,  1  %;  Fort  Tcjoii,  Caliiorniii,  1  J. 


T)').  S.  inai'itilllUS  Mots. — Form  moderately  robust.  Pubescence  ex- 
cessively spars(i,  rather  long,  recumbent,  fine,  and  ciner<'ons.  Head  rather 
large,  twice  as  wide  as  long;  interocular  surface  nearly  Hat,  sub-e(pially 
trilobed  by  the  rather  conspicuous  sulcations  ;  sparsely,  fincdy,  and  very 
irregularly  punctate  ;  longitudinal  elevation  moderate,  almost  im|)unctate, 
evenly  convex  ;  ocular  lines  me(>ting  at  one  length  ;  antennae  as  long  as  th(> 
width  of  head,  rather  slender,  black,  last  fonr  joints  much  paler,  (dub  distinct  ; 
third  joint  one-half  as  long  again  as  tlm  fourth,  fourth  slightly  longer  than 
fifth,  sixth  much  shorter,  joints  of  club  increasing  in  length  ;  maxillary 
palpi  pale  flavo-testaceons  throughout,  third  joint  scarcely  longer  than  the 
second.  Prothorax  robust,  sides  strongly  div(U-gent  and  nearly  straight  to  a 
point  one-third  the  entir(?  length  from  the  anterior  margin,  wher(>  the  width 
is  nearly  equal  to  the  length,  the  sides  thence  converg*'  rather  rapidly,  and 
are  almost  straight ;  anterior  margin  much  shorter  than  the  posterior,  nearly 
equally  arcuate  ;  surface  coars(dy  and  mo(lerat(dy  closely  punctate,  punctures 
feebly  impressed,  interspaces  very  convex,  polished  ;  canaliculation  roundly 


.  A-  u  i  r 


.!iSu 


^:ma^ 


74 


NOKTII    AMKUICAN 


Iniprossoil,  cliiUsliaix'il,  wiili'st  in  front,  l)n>;iniiinf,'  slightly  Vx'foni  tlio  niiddlo, 
oiu'-tliinl  ,'is  Idiij;  as  tli(!  [H'onotiini.  Elytra  at  bast!  an  wiilo  as  tlio  lu'ail ; 
siilcs  niddiiati'ly  divergent  jiosteridrly,  just  pereeptilily  longer  than  the  width 
at  base,  tetd)ly  aroiiato  ;  together  liroadly  and  strongly  eniarginato  behind; 
suture  one-tenth  as  long  again  as  tlie  in'onnluni  ;  surfat^i^  of  each  elytrtui 
distinctly  and  longitudinally  swollen  in  the  middle  near  the  base,  very  un- 
even, punctures  large  and  feebly  impressed,  interspaces  vory  convex  liighly 
polished.  Abdominal  segments  (leer<>asing  uniformly  and  very  gradually 
in  width,  (irst  as  widi-  as  the  (•oiitiguous  elytra;  surface  liroadly  convex, 
shining,  very  finely  and  remotely  punctnlate  ;  transverse  carinae  not  eusped. 
Legs  slender,  rather  dark  fuscous,  paler  at  the  bases  of  the  femora  ;  lirst 
joint  of  the  posterior  tarsi  twi(^e  as  long  as  the  second,  as  long  as  the  second 
and  third  together,  last  joint  much  shorter  than  the  first. 

Male. — Fifth  ventral  segment  eniarginato  in  its  middle  third  at  apex, 
einarginalion  evenly  rounded,  seven  to  eight  times  as  wide  as  deej),  contigu- 
ous surface  feebly  imjiressed  for  a  short  distance  anteriorly;  sixth  segmeiit 
sinuate  at  apex,  sinus  large  and  acutely  rounding  at  bottom,  but  sligl'tly 
more  than  twice  as  wide  as  deep. 

FpiikiIc — Sixth  ventral  segment  prominently  and  acutely  eusped  at  apex. 

Length  4.2-4.ri  mm. 

Sitkii,  Alasku,  2;  A'aneoHVfM'  Islaiid,  1. 

TIk'  above  description  was  taken  from  tlie  Vancouver  female,  tlie 
Alaskan  specimens  seem  to  be  slightly  immature,  as  the  antennae  are 
unit'ormly  of  a  jiale  pieeous-brown. 

r)().  S.  nioiitaiillS  n.  sp.  (Schwarz  MS.). — Form  slender.  Pubescence 
rather  long  and  sparse,  recumbent,  line,  fnsco-cinereous.  Head  large, 
scarcely  twice  as  wide  as  long;  interocular  surface  Hat,  punctured,  inter- 
spaces one-half  the  width  of  tlu!  imnctures,  rather  flat,  shining  ;  longitudinal 
elevation  narrow,  in  the  form  of  an  acute  ridge  rising  far  above  the  general 
level;  ocular  lines  meeting  at  about  one  and  one-half  lengths  in  advance; 
antennae  slender,  much  longer  than  the  width  of  heail,  piceous-brown 
throughout,  club  slender;  third  joint  one-half  as  long  again  as  the  fourth, 
fourth  and  lifth  nearly  equal,  sixth  distinctly  shorter  than  the  seventh,  joints 
of  club  (dinigated  ;  first  joint  of  maxillary  palpi  testaceous,  second  darker, 
third  very  rolmst,  fuscous.  Prolhorax  very  short  and  robust,  widest  at  one- 
third  the  length  from  tlie  anterior  margin,  where  it  is  as  broad  as  long  ; 
sides  thence  moderately  convergent  posteriorly  and  straight ;  anterior  and 
posterior  margins  sub-e(inal ;  surface  nearly  even,  rather  coarsely  and  evenly 
punctured  ;  punctures  round  and  impressed,  interspaces  eipial  to  them  in 
width,  shining  ;  eanaliculation  rather  feeble,  narrow,  commencing  just  be- 
hind the  anterior  margin  and  becoming  extinct  at  the  base.  Elytra  at  base 
much  narrower  than  the  head  ;  sides  strongly  divergent  posteriorly,  longer 
than  the  wi<lth  at  base  and  very  feebly  arcuate  ;  together  broadly  and  just 
perceptibly  emarginate  behind  ;  suture  one-sixth  as  long  again  as  the  pro- 
notum  ;  surface  nearly  evenly  convex,  coarsidy,  feebly,  and  (juite  evenly 
punctured,  interspaces  much  narrower  than  the  punctures,  feebly  convex, 


COLEOPTKUA. 


76 


|Milisli('il ;  junictiircs  only  cfmlusciug  in  twos  iicar  the  cxtri'irio  imI^cs,  jukI 
thcic  (iiily  i):irtiiilly.  First  two  alMloiiiiiiftl  .scjiiiicnts  of  <'<nijil  wiiltli  and 
>lij,'litly  narrower  tlian  the  contij^'iKius  elytra;  liordei'  iiioilerate;  siirt'aec  con- 
vex, coarsely,  feebly,  ami  very  closely  punutulale  ;  transverse  carinao  not 
cusped.  Legs  sU'iiiler,  ])ale  jiiceons  ;  first  joint  of  tlie  posterior  tarsi  twice 
as  lonj^  as  the  second,  second  and  third  tMjual  in  length.  I'nder  surface  of 
the  ahdonien  pic('ous-l)lack. 

Mall'. — Posterior  ed<;(!  of  the  fifth  ventral  sefrnn'nt  very  broadly  and  just 
l>erceptihly  eniarginate  ;  sixth  se<;nmnf  sinuate  at  the  ai)ex,  sinus  evenly 
rounded,  as  wide  as  deep,  on<'-sixth  as  wide  as  the  sej^^iuental  apex. 

FciiKil)'. — Sixth  segment  broadly  and  very  distinctly  ungulate  at  tip. 

Length  3.U  mm. 

New  Ilumpsliire,  Wliiti'  IMountains,  2  (loicsts). 

Tliu  compunitive  shortness  of  tin;  sixtli  antennal  joint  renders  this 
siiceies  retidily  distinguishable;  it  is  also  very  distinct  in  other 
eliaracters. 


m\ 


•u.  S.  alpicola  Fvl. — Form  moderately  slender.    Pubescence  extremely 

fine,  moderately  long  and  rather  abundant,  setiform,  jiale  piceoiis-ljrown, 
not  conspicuous.  Head  rather  larj^c,  much  less  than  twice  as  wide  as  long; 
interocular  surface  nearly  fiat,  two  and  one-half  times  as  wide  as  the  eye; 
(•(jnally  trilobed  by  tb«!  moderately  distinct  snlcations  ;  intermediate  surface 
moderately  and  evenly  convex  ;  very  closely,  rather  coarsely,  and  evenly 
I'unctate,  interspa<'es  sliining;  ocular  lines  meeting  at  slightly  more  than 
one  length  in  advance  ;  antennae  slender,  slightly  longer  than  the  width  of 
head,  dark  piceous-brown,  club  slender:  third  joint  three-fourths  as  long 
again  as  the  fourth,  fourth  and  fifth  sub-equal,  sixth  and  seventh  e(jual, 
shorter,  eighth  slightly  elongated  and  just  ])erceptibly  wider  than  the  sixth, 
joints  of  club  increasing  in  length,  last  nearly  as  long  as  the  two  preceding 
together  ;  maxillary  ])alpi  very  long  and  slender,  dark  piceons-brown,  paler 
toward  the  base.  Prothorax  rol)ust,  widest  very  slightly  ))efore  the  midille, 
wiiere  it  is  three-fourths  as  wide  as  the  In^ad,  and  as  wide  as  long  ;  sides 
thence  moderately  convergent  ])osteriorly  and  feebly  sinnatt," ;  anterior  and 
IMisterior  margins  eijual  in  length,  the  former  very  slightly  the  more  arcuate  ; 
surface  evenly  convex,  rather  coarsely,  closely,  variolately,  and  somewhat 
evenly  i>unctate  ;  canaliculation  conspicuous,  narrowly  fusiform,  deep,  bottom 
cveidy  rouniled,  terminating  at  a  distance  from  cither  margin  e<nial  to  one- 
sixth  the  entire  length.  Elytra  at  base  much  narrower  than  the  head,  and 
just  perceptibly  wider  than  the  prothorax ;  sides  strongly  divergent  poste- 
riorly, feebly  arcuate,  and  much  longer  than  the  width  at  base;  together 
bi'oadly  and  feebly  emarginate  posteriorly;  suture  scarcely  one-sixth  as  long 
again  as  the  pronotum  ;  surface  rather  depressed,  transversely  and  feebly 
imiiressed  just  before  tlie  middle,  the  impression  extending  posteriorly  near 
the  external  edge  of  each  elytron  ;  coarsely,  f'eel)ly,  closely,  and  quite  evenly 
punctate,  punctures  ftnly  coalescent  posteriorly  near  the  suture,  inters[)aces 
convex,  very  narrow,  highly  polished.     Abdominal  segments  decreasing  at 


M 


76 


NOrtTII    AMRllICAN 


"XI 


first  slowly,  tlicii  inure  rnpiilly  in  wiittli  idistcriorl y,  lirwt  ilistiiictly  widi-r 
tlinr.  the  coiitijiUinis  elytra;  siirl'.ue  lirojiilly  eonvex,  cnarsely,  closely,  ami 
variolately  iiuiictulate  ;  triiiisverne  earinne  not  eiispi'il.  Legs  rather  lonjj 
and  slender,  ilark  i)ici'miM- brown  ;  llrst  Joint  of  tlio  posterior  tarsi  fonr-Ht'tlis 
as  lotii,'  af;ain  as  the  second,  second  as  lon<;  ah  the  third  and  fonrth  to).'ether, 
fonrtii  very  short.  I'nder  surface  of  the  ahdonien  piccons-hlack,  very  finely 
aiiil  closely  iinnctnlate. 

M<ili . — Posterior  e(lf,'e  of  the  fifth  ventral  Hej,'nient  just  jierceptihly  hilohed, 
Jiriiis  extremely  divei'i^'eiit ;  sixth  se;;inent  stronj;ly  liilohed  at  apex,  eniarf;i- 
iiation  twico  as  wide  as  deep;  st^veiith  sej^inent  vory  narrow,  truncate  at  the 
apex. 

Female, — Sixth  segment  broadly  and  triangularly  produced  ;  angle  very 
prominent. 

Length  2.(!-;5.0  mm. 

Garland,  Colonulo,  7  ;  Vcta  Pass,  Colorado,  2  ;  British  Columl>ia,  4. 

A  8i)eciinen  from  Uritisli  Colmnbia  is  singularly  defornu'd  by  an 
enlarjicnicnt  of  tiie  Icl't  eyo.  TIk'  idciitilication  of  tiiis  s|)(;cies  is  due 
to  Mr.  Famed,  and  as  it  is  a  sonu-wiiat  rare  European  species,  its 
oei'urrence  on  tiic  western  side  of  our  eontineiit  is  ratiier  riiniarkable. 
In  one  spe(Mnieii  llie  apical  joint  of  tiie  iid't  antenna  is  deeply  exca- 
vated nearly  tliroiitrliout  its  entire  leniith  and  widtii,  as  if  tiie  sin-face 
liad  been  acciidentally  cruslKMl  in.  The  probable  caus«!  of  tliis  condi- 
tion, wiiicdi  is  of  soinewiiat  freipient  occurrence  in  the  species  of  tiiis 
genus,  may  periuips  lie  in  the  internal  structure  of  the  terminal  joint. 
The  interior  fibres  of  the  joint  on  drying  contract,  <lra\ving  in  the 
weakest  jiortion  of  the  surface  in  sncli  ii  way  as  to  leave  a  deep  ex- 
ternal concravity;  its  it  is  always  found  on  tlu;  under  side,  we  must 
presume  that,  at  this  point,  tiie  walls  of  the  joint  are  weakest,  or  most 
firmly  attached  by  nerve  fibres  to  the  interior  tissues.  It  would  be 
intei'esting  to  know  whetiier  tiie  couditioii  is  ever  observed  in  s[)eci- 
mens  recently  taken. 


Subdivision  8, 
Group  II. 

This  group  consists  of  a  very  limited  number  of  species  of  peculiar 
appearancfi.  Tiiey  are  of  ratluir  small  size,  robust,  and  somewhat 
strongly  depresse<l  ;  the  elytra  are  large,  and  the  humeral  angles 
promiiK^nt ;  the  head  is  small.  Tlie  (dytral  suture  is,  in  all  cases,  at 
least  one-half  longer  tlian  the  pronotum. 

The  sjiecies  which  seem  worthy  of  adoption  are  fivt>  in  number ; 
they  are  peculiar  to  the  regions  west  of  the  Ilocky  Mountains,  and 
may  be  tabulated  as  follows  : — 


COI.KOPTEnA. 


77 


■  ' '  iti 

^i  J  i 

I'r<itli(irftx  ns  widn  ns,  or  wider  tluin  Iimg. 

I.cgs  black  tlii'oiighout ;  Idiiyitiidiiial  clfvation  of  iiitci'oi'iilar  Miirracccvi'iily 

(•OllVfX. 

I'roiKitimi  liaviiij;  a  liiiit,'itudiiial   ridgc-likc  (dc-vatioii  at  tlif  nidi's  of  the 

caiialiciilatioii ;   liody  vi-ry  roliiist fiS.   CftstaliH. 

I'l'onotuin  not  rid};<'d  ;  Ixidy  laiicli  iii(iri<  slt'iidcr fit).  alvcolatllH. 

l'"i'iiioia  <listiii(tly  iiiro-l'iis( mis  ;  l(iiif;if tidiiial  idcvatioii  of  intrrocular  siir- 
faie  acute  ;  (iroiiotiim  liaving  very  obscuro  lateral  ridges. 

00,  ellipf iciis. 

I'riitliornx  narrower  than  long. 

icicles  of  jironotmn  feebly  areiiate  ;  jirotliorax  suV-cylindrical,  very  dis- 
tinctly narrower  than  long til.  u<It>IO|iH. 

tildes  of  pronotuni  strongly  arcuate  anteriorly;  iirothoiax  very  slightly 
narrower  than  long  f>2.   1  lie  til  OH  US. 

58.  S.  COStalis  n.  sp. — Form  very  robust.  l'ubescen(;e  line,  close,  semi- 
erect,  rather  short,  i)iceous-l)rown,  not  conspicuous.  Head  robust,  snuiU, 
twice  as  wide  as  long  ;  interocular  surface  n.ore  than  twice  as  wide  as  the 
eye,  neaily  Hat,  eiiually  trilobed  by  the  very  distinct  sukations,  lobes  (Mjually 
mid  evenly  <'onvex  ;  punctures  fine,  very  even  and  close,  finer  in  the  uiiddlu; 
ocular  lines  meeting  at  ont>  length  in  advance;  antennae  slightly  longer 
than  the  width  of  head,  slender,  club  lai'ge,  piceous-l)lack  ;  third  Joint  some- 
wliat  mort*  than  one-third  aa  long  again  as  the  fourtli,  fourth  and  (ii'th  sub- 
ci|nal,  joints  six,  seven,  and  eight  sub-equal  in  lengtli,  the  latter  oval  in 
outline,  joints  of  club  robust,  last  two  slightly  wider  than  the  ninth,  last 
joint  but  slightly  longer  than  wide;  maxillary  paljii  long,  piceous-black. 
Prothorax  robust,  widest  distinctly  before  the  iniildle,  where  it  is  nearly  five- 
sixths  as  wide  as  the  head,  and  slightly  broader  than  long  ;  sides  thence 
moderately  convergent  jiosteriorly  and  rather  strongly  sinuate  ;  anterior 
niaigin  sliorter  and  much  more  arcuate  than  tlu^  postei'ior  ;  surface  strongly 
swollen  along  the  sides  anil  at  the  edges  of  the  canaliculation,  giving  the 
apjiearance  of  four  longitudinal  ribs,  strongly  and  transverstdy  impressed 
just  beliind  the  anterior  n\argin  ;  liuely,  very  closely,  evenly,  though  veiy 
confusedly  and  roughly  sculptured  ;  canaliculation  distinct,  deeply  impressed, 
terminating  at  ('(jual  distances  from  the  margins,  two-thirds  as  long  as  the 
jironotum.  Elytra  at  base  much  wider  than  the  head  ;  sides  very  feebly 
ilivergent  posteriorly,  just  perceptibly  longer  than  the  width  at  base,  dis- 
tinctly arcuate  ;  together  broadly,  rather  strongly,  ami  triangularly  emargi- 
iiate  behind  ;  suture  onc^-half  as  long  again  as  the  pronotum  ;  surface  ratlier 
bi'oadly  and  strongly  impressed  on  the  suture  at  the  base,  vt'ry  finely,  ex- 
ceedingly closely  and  irregularly  sculptured ;  punctures  almost  entirely 
coalescent  in  very  long  and  devious  channels,  with  occasional  spots  where 
tliey  are  confusedly  broken  up;  they  generally  j)ursue  a  longitudinal  or 
obli(iue  direction.  Abdominal  segments  very  broad,  rapidly  and  ariMiately 
diminishing  in  width,  first  nearly  as  wide  as  the  contiguous  elytra;  surface 
shilling,  feebly  convex,  rather  finely  punctulate,  more  finely  so  behind; 
transverse  carinae  tricuspid,  ndddhi  cusps  short  and  tapering,  lateral  broad 
and  somewliat  rudimentary.  Legs  rather  short  and  slender,  piceous-black ; 
first  joint  of  the  posterior  tarsi  three-lifths  as  long  again  as  the  second,  as 


m 


<H  NOnril    AMKIIICAV 

long  ftK  tlir  last,  JiiintH  two  to  lour  iiniforinly  ami  ratliiT  raiiiiliy  (Iccrcnsiiig 
ill  Iciintli. 

Mulv. — Kiftli  ventral  Hcjjiiii'iit  iii>l  im-nHiirnlily  iiioilifltMl ;  Hixtli  Hcj,'ini'iit 
f*iiiiiftti<  at  (ipi'x,  Himis  ax  widf  uh  tin'  upict-H,  and  of  fiiuHl  eiirvatnrc,  di'itp, 
two  and  ont'-h.'ilf  tiiiicH  as  widi-  as  deep,  cvonly  voundiiiK  at  the  Imtloin  ; 
Hi'Vfiitli  scfiiiii'iit  fvi'iiiy  and  t'l-cldy  ttniaininati!  at  tin-  ti|i,  wliicli  is  lliickly 
liristling  witli  sliort,  coarsf,  sftai-. 

/•'iiiiiilf. — Sixth  scgiiiciit  ratlii'i'  narrow,  evenly  rounded  hidiiiid. 

I^eiigtli  3.(t-:i.l  nun. 

Lak«^  Tiilioe,  Neviulii,   I  ;  California,  I'). 

Tiiis  species  is  very  nihiist,  and  is  (lisliiif^iiislied  liy  its  very  laif^e 
elytra  and  tlie  siiijfiilar  ridj^ed  appeafaiiee  of  tlie  prolliorax.  'I'iie. 
sexual  eliaracters  .seem  to  vary  siiglilly  in  dejrnfe. 


59.  H.  iilvcolilf  IIH  n.  sji. — Form  ndiiist.    PulH-seeiieo  rather  short,  closit, 
snti-reeuiiilient,  line,  pliiinlieo-einereons.    Head  small,  twice  as  wide  as  long  ; 

intei ular  surface  nearly  Hat,  slightly  more  than  twice  as  wide  as  the  e-    , 

coarsely,  very  dosidy,  and  rather  confusedly  puni'tate,  esi)ecially  toward  the 
eyes  ;  longitudinal  eh'vation  slightly  narrower-  than  the  lateral  portions, 
evenly  and  rather  strongly  convex  ;  ocnlar  lines  meeting  at  one  length  in 
advance;  antennae  longi-r  thai,  the  width  of  head,  l)la(d<,  rather  roliu.d, 
club  large;  third  joint  one-third  as  long  again  as  the  fourth,  fourth  and  fifth 
ecjual,  sixth  and  seviMitli  shorter,  e(iual  in  length,  the  latter  thicker  juid 
oval,  eighth  very  slightly  elongated,  as  wi<le  iis  the  seventh,  s  , lobular, 
joints  of  club  increasing  r.-ipidly  in  length  aiiil  thickness,  last  joint  l;irge, 
acuniinato  at  tip;  maxillary  palpi  moderate  in  length,  piceous-ldack,  llrst 
joint  i)ic<M)-testaceous,  third  joint  v>;ry  robust.  Prothorax  small,  arcuately 
widening  to  a  point  slightly  in  advance  of  the  middle,  where  it  is  very  slightly 
narrower  than  the  head,  and  slightly  broader  than  long  ;  sides  thence  mode- 
rately convergent  posteriorly  and  nearly  straight;  anterior  margin  jiist  per- 
ceptil)ly  shorter  and  much  more  ar(!nate  than  the  jiosterior ;  surface;  faintly 
tuberculate  along  the  sides,  feebly  and  transversely  im])ressed  just  behind 
the  anterior  margin  ;  extremely  closely,  roughly,  but  rather  evenly  luini;- 
tate  ;  canaliculation  rather  broad,  shallow,  impressed,  terminating  at  e(iiial 
distances  from  tht;  base  and  ajiex,  two-thirds  as  long  as  the  jtronotuni,  sides 
very  slightl}'  swollen.  Elytra  at  base  much  w  ider  than  the  bead  ;  sides  very 
feebly  divergent  posteriorly,  slightly  longer  than  the  width  at  base,  nearly 
straight;  together  broadly  and  very  fetdily  emarginate  bidiind;  suture  two- 
thirds  as  long  again  as  the  pronotum ;  surface  finely,  deeply,  very  roughly, 
evenly,  and  extremely  closely  punctate  ;  punctures  seldom  coalescent ;  lustre- 
less. Abdominal  segments  decreasing  uniformly  and  ra])idly  in  width,  first 
just  perceptibly  narrower  than  the  contiguous  elytra  ;  surface  rather  fe(d)ly 
convex,  Unely,  evenly,  and  rather  closely  punctulate  ;  transverse  carinae 
tricuspid,  middle  cusps  rather  short  and  finely  acuminate  at  tip,  lateral 
merely  a  confused  proje'^tioi.,  very  broad,  and  often  enclosing  a  large  i)unc- 
ture.  Legs  short  and  slen<ler,  femora  and  tibiae  black  above,  piceous-black 
beneath,  tarsi  piceous-black  ;   first  joint  of  posterior  tarsi  scarcely  one-half 


'  H 


COI.KOI'TKI   \. 


70 


an  loll);  afjniii  ns  tlio  second,  nn  lonj,'  as  tlu^  liftli,  JoliitH  twii  to  four  iiiiitoniily 
anil  very  jirailiially  diHiriMiHing  in  length.     Jlody  winged. 

Aliilv, — I'nknown. 

Fiiiiiilf, — Sixth  ventral  se^jnient  rather  narrow,  romiil>'(l  lii-hiiid,  just  jier- 
ceptilily  and  ohinsely  i)r()diired  hehiiid  in  the  niiddlu. 

Length  -.<i  nun. 

Lake  'riilioc,  Nevudii,  I. 


I 


M 


(W.  N.  <'lli|>tif'llH  n.  s|>, — Form  rohiist.  rnhi'seence  excesnivi'Iy  short, 
rather  sparse,  iMect,  ]ii<'eo-|i|uniliens,  very  in(c(ns[(icuouH.  Head  rather 
small,  very  rohust,  much  lesH  than  twice  as  wichi  m  long ;  ititerocular  surtaue 
distinctly  more  than  three  finn'S  as  wide  as  the  eye,  nearly  tiat ;  lon!,'itn<linal 
elevation  slif^htly  wider  than  the  latiTal  jiortioiiH,  evenly  and  rather  stronely 
convex,  rising  slightly  ahove  the  level  of  the  eye  ;  jJunctureH  coarse,  rather 
close,  eveidy  distrihuted  ;  ocular  lines  meeting  at  two  lengths  in  ailvance; 
eyes  very  narrow  ;  antennae  as  long  ;  s  the  width  of  head,  Idack,  rather 
slender,  elnh  nioderati"  ;  third  joint  almiiitiy  narrower  Jit  the  hiise.  one-third 
longer  than  the  fourth,  fourth  and  lifth  eiiiial,  sixth  slightly  longer  than  the 
seventh,  more  slender,  eighth  slightly  shorter,  as  wide  as  the  si'Venth,  club 
compact,  joints  increasing  gradually  in  length,  tenth  widest;  maxillary  jialpi 
Well  developed,  black,  lirst  joint  very  slightly  i)aler,  piceo-testaceons.  Pro- 
thorax  very  robust,  widttst  just  before  the  middle,  where  it  is  nearly  as  wide 
as  tin?  head,  and  as  wide  as  long;  si(b's  thence  rather  rai)idly  conveigent 
posteriorly  and  very  feidily  sinuate  •  anterior  and  posterior  margins  e(|ual 
in  length,  the  former  slightly  the  more  arcuate;  surface  rather  acutely  ami 
longitudinally  ridged  at  a  short  distance  from  the  canaliculation,  margins 
of  canaliculation  elevated;  transversely  impressed  immediately  behind  the 
apex  ;  i)unctures  small,  variform,  very  closely  compacteil,  irregularly  p(dy- 
gonal,  interspaces  acute;  I'analiculation  ratluu'  deeply  impressed,  terminat- 
ing at  distances  from  the  base  and  ajiex  ennal  in  length  to  one-eighth  of  the 
pronotum,  nearly  equal  in  width  throughout,  bottom  punctate.  Elytra  at 
base  much  wider  than  the  head  ;  siiU^s  distinctly  divergcmt  posteriorly,  longer 
than  th(!  width  at  base,  feebly  arcuate  ;  together  roundly  and  rather  strongly 
emarginate  in  the  middle  half  behind  :  suture  one-half  longer  than  the  pro- 
notum ;  surface?  impressed  feebly  along  the  suturi;,  uwvi;  broadly  so  at  base, 
longitiutinally  and  feebly  impressed  near  tlie  humeri :  sculpture  feeble  and 
very  irregular  ;  m-ar  the  borders  of  the  sulural  inijiression  the  punctures  are 
very  small,  feeble,  distant,  and  isolated,  interspaces  nearly  Hat  and  very 
highly  polished  ;  between  this  and  the  sides  the  sculpture  consists  of  a  con- 
fused network  of  channels,  '•  ith  tin;  interspaces  acute  ;  near  the  liumtMi  the 
punctures  are  distinct  and  very  close,  with  the  interspaces  narrow  and  feebly 
lustrous.  Abdominal  segments  decreasing  uniforndy  and  rapidly  in  width, 
first  distinctly  narrower  than  the  contiguous  elytra  :  surface  feebly  convex, 
closely,  evenly,  and  coarsely  jiunctulate,  interspaces  polisiied  ;  transverse 
carinae  tricuspid,  middle  cusps  long,  rather  finely  acuminate,  prominent, 
lateral  much  shorter,  broad,  r.nd  very  indefinite.  Legs  rather  short  and 
slender,  piceous-black,  femora  distinctly  fuscous  beneath  toward  the  base; 
first  joint  of  the  posterior  tarsi  two-thirds  longer  than  the  second,  as  long  as 


I 

V-' 


1*11 


80 


NORTH    AAU'.IUCAN 


tlic  lost,  longer  tljaii  tlji'  next  two  together,  fourth  joint  narrow,  very  obliquo 
and  tliin. 

M(ih\ — Posterior  edge  of  the  liftli  ventral  segment  very  feebly  eniarginate 
in  its  middle  sixth,  (niiargination  evenly  I'ounded  and  scarcely  measiiralile, 
edge  of  emargination  gr;iniilose;  sixth  segment  sinuate  at  apex,  sinus  nar- 
rower than  the  ajiiees  and  more  acutely  rounchMl,  evenly  round<'d  at  the 
bottom,  one-half  wi(h)r  than  (h'cp  ;  seventh  very  feebly  emurginato  at  apux. 

FciiKilc. — I 'n  known. 

Length  3.(1  mm. 

Ciilif'oriiiii,  1. 

'I'liis  very  distinct  species  diU'crs  markedly  from  costalls  in  the 
structure  of  tlie  licad,  and  the  nature  of  tln^  pimcliiatioii  of  tlu;  iiiter- 
o(!iih>r  surface,  wiiicli  is  very  iiiucii  coarser  than  in  tliat  species  ;  tliere 
are  also  many  other  minor  differences. 

61.  S.  adelops  n.  sp. — Form  r(d)ust.  f'ubescence  very  short,  line, 
somewhat  close,  evenly  ilistributeil,  sub-recumbent,  piceo-i)lunibeous,  not 
conspicuous  ;  on  the  under  surface  of  the  abdomen  it  is  more  plentiful, 
short,  and  cinereous.  Head  very  small,  twice  as  wide  as  long;  iiiterocular 
surface  Hat,  three  times  as  wide  as  the  eye,  equally  trilobcd  by  the  rounded, 
rather  d<M'p,  and  <'ons))icuous  sulcations  ;  jiunutiu'es  very  small,  round,  veiy 
close,  and  evenly  distributed  ;  ocular  lines  meeting  at  more  than  two  lengths 
in  advance ;  antennae  rather  short,  ' '  ^ck,  slightly  longer  than  the  width  of 
heail,  very  robust,  cluli  prominent  ;  thinl  joint  one-fourth  longer  than  the 
fourth,  fourth  and  fifth  eijual,  sixth  an<l  seventh  ab-ujitly  much  sluu'ter, 
e(iiial  in  length,  tlie  latter  sliglitly  thicker,  eighth  slightly  elongated,  thicker 
than  the  seventh,  nearly  evenly  elliptical,  club  ratlier  compact,  joints  in- 
creasing rapidly  in  lengtli,  tenth  wider  than  long  and  l)roadest,  last  as  'ong 
a^  the  eighth  and  ninth  together;  maxillary  palpi  intense  black  tliroughout, 
rather  slun't  ami  robust,  third  joint  densely  clothed  with  cinereous  j)ubes- 
cence.  Prothorax  widest  in  the  middle,  wliere  it  is  nearly  seven-eigliths  as 
wide  as  the  head,  and  slightly  narrower  than  long ;  sides  thence  extrenudy 
feebly  convergent  posteriorly  and  nearly  straight;  anterior  margin  shorter 
and  much  more  arcuate  than  the  posterior  ;  surface  rather  strongly  tubercu- 
late  along  the  sides  and  abov<',  and  also  along  th»>  margins  of  the  canalieu- 
lation  ;  transversely  and  rather  strongly  impressed  just  behind  the  apex  ; 
punctures  very  line,  closely  crowded,  and  rather  obscure  ;  between  the 
tuberc'iliform  costae  and  in  the  canalicuh'tion  the  punctures  are  more  dis- 
tant, with  the  intersi)aces  very  feebly  lustrous,  elsewhere  nearly  opn(iue  ; 
canaliculation  nai  row,  fusiform,  two-thiids  as  long  as  the  pronotum,  termi- 
nating at  ('(pial  dista.ices  from  tb.e  base  and  apex,  rather  deeply  iuiiuessed. 
Elytra  at  base  one-thinl  wider  than  the  liead  ;  sid<!S  just  percej)til)ly  diver- 
gent posteriorly,  longer  than  the  width  at  base,  very  feebly  and  nearl;  evenly 
arcuate;  together  feebly  emarginate  behind;  sutur(^  one-half  longer  than 
the  iironotiiui ;  surface  nearly  as  in  cm^tiiUs,  though  rathe/  more  f  ebly  sfulp- 
tured.  Abdominal  segments  uniforndy  and  very  rapidly  decreasing  in  width, 
first  just  visibly  narrowt^r  than  tlie  contiguous  elytra  ;  surface  feebly  convex, 
rather  finely,  feebly,  and  closely  punctulate  :   transverse  carinae  tricuspid, 


COLEOPTKRA. 


81 


iiiiddle  onsps  as  l)roa(l  at  basf  as  loii^,  ra|)i(lly  ami  latlier  finely  aciiniiiiati', 
lateral  nearly  as  long,  lirtiad,  and  eonfiised.  Legs  moderate!  in  length  and 
veiy  slender,  black  tliiciughont  ;  lirst  fonr  joints  of  the  posteiior  tM'si  decreas- 
ing very  uniforndy  and  gradually  in  length,  lirst  scarcely  one-third  longer 
tlian  the  second,  two-thirds  as  long  as  the  last. 

Male. — Unknown. 

FtiiKil)'. — Sixth  ventral  segment  aeuti'ly  rounded  behind. 

Lengtli  o.d  mm. 

Nortliern  Califoriiin,  1. 

Tliis  sixic'ics  greatly  rcsenihlcs  ro.sfdiis,  and  diircrs  from  it  in  the 
structure  of  the  protlioi'ux,  it  being  nuich  more  cylindrical  than  in 
tliat  s[)ecies  and  proportionally  very  mncii  narrower;  it  ahso  differs 
notably  in  the  length  ol'  tiie  antennae  and  [)roportional  lengtlis  of  the 
joints,  and  in  tiie  nuich  more  |)l(!ntifnl  and  conspicuous  einereouj^ 
pubescence  of  the  under  surface  of  tiie  abdomen.  The  gcMieral  form 
is  more  slender,  and  the  elytia  are  long(;r  in  proportion  to  their  widtii 
than  in  costa/is. 

ti2.  S.  lllctllOSIlS  n.  sp. — Form  voliust.  PiihcKcence  very  short,  rather 
sparse,  recumbent,  line,  plumbeous.  Head  small,  but  robust,  not  twice  as 
wide  as  long;  intevocular  surface  Hat,  nc'arly  three  times  as  widt*  as  the  <iye, 
unequally  trilobed  by  the  moderately  conspicuous  sulcations  ;  intermeiliate 
surface  ratiier  strongly  and  evenly  convex,  somewhat  prominent ;  punctures 
rather  coarse,  close,  evenly  distriliuted,  except  in  the  sulcations,  where  they 
are  more  crowded  ;  oi'ular  lines  meeting  at  slightly  more  than  two  Ujiigtiis  in 
advance;  antennae  much  longer  than  tiie  width  of  head,  black,  slender,  club 
iiiO(l<'rate  ;  third  Joint  (ui'i-third  as  long  again  as  the  tbuitii,  fourth  and  fifth 
e(jual,  sixth  and  seventh  ecjual  in  length,  the  latter  thicker,  eighth  cordate, 
slightly  longer  than  wide,  joii'ts  of  club  all  robust,  increasing  in  length,  last 
joint  feebly  acutninate  at  tip;  maxillary  palpi  long,  piceous-black,  first  joint 
dark  tt\staceous.  Prothorax  widest  at  the  middle,  where  it  is  four-lifths  as 
wide  as  the  head,  and  very  slightly  narrower  than  long;  sides  thence  mode- 
rately convergent  posteriorly  and  slightly  sinuate  ;  anterior  and  jiosterior 
margins  equal  in  length,  the  former  rather  feebly  arcuate,  the  latter  almost 
straight ;  ;  urface  very  faintly  uneven  ;  finely,  closely,  and  etvuily  juinttate; 
jiunctures  sub-variolate  and  gtMierally  irregularly  j)ol3'gonal  ;  canaliculation 
obscurely  outlined,  shallow,  narrow,  beginning  before  the  middle,  one-half  as 
long  as  the  i)ronotum.  Elytra  at  base  distinctly  wider  than  the  head;  sides 
very  f.'ebly  divergent  posteriorly,  much  longer  than  the  width  at  i>ase,  very 
feebly  arci  ate,  more  strongly  so  posteriorly  ;  together  ratlier  narrowly,  sub- 
triangularly,  HI  ^.  somewhat  strongly  emarginate  behind  ;  suture  about  one- 
lialf  as  long  again  .as  tlie  pronotum  ;  surface  very  feelily  imjiressed  along  the 
suture,  and  somewhat  strongly,  unevenly,  and  longitmlinally  impressed  in 
the  middle  of  each  elytron  toward  the  base,  finely,  (dosely,  somewliat  un- 
evenly punctured  ;  punctures  isolated  near  the  suturii  and  the  base,  inter- 
sjjaces  Hat  and  minutely  reticulated  ;  coalescent,  and  closely  crowded  in  the 
impressed  portions.  Abdominal  segments  decreasing  uniformly  and  rapidly 
Ste.nini.  Ij 


1^    '!. 


82 


NORTH    AMEKICAN 


in  width,  first  distinctly  narrowcv  than  the  contignons  elytra;  surface  fcchly 
convex,  coarsely,  very  closely,  and  evenly  jmnctnlate ;  transverse  carinae 
trifusi)iil,  niiildle  ciisjts  Ion;,',  heconiing  linely  aciciilar  at  tiji-,  lateral  l)r(>ad, 
short,  widening  at  ajx'X.  Legs  moderately  long  and  slt-nder.  Mack  al><)ve, 
piceouH-black  beneath;  lirst  joint  of  the  posterior  tarsi  twi<'e  as  long  as  the 
second,  as  long  as  the  fifth,  second  and  third  sub-tujual,  fourth  short  and 
obli(ine,  fifth  V(>ry  slender. 

Mule. — Posterior  edge  of  the  fifth  ventral  segment  feebly  eniarginato  in  its 
middle  fourth,  eniargination  evenly  rounded,  twelve  to  fifteen  times  as  wide 
as  deej),  ('(Uitiguous  surfaci!  feebly  and  cylindrically  impressed  throughout 
anteriorly;  sixtli  si'gnient  sinuate  at  ai)i'X,  sinus  small,  equal  in  width  to 
the  vertices,  somewhat  more  acute  in  curvature  at  bottom,  about  twice  as 
wide  as  deep. 

Female. — Sixth  segment  rounded  leliind. 

Length  2. It  mm. 


Caliibrnia,  2 
Cohuiibia,  1. 


Lake   Talioe,   Nevada,  3  ;    T.akc   Qiiesnel,  British 


Subdivision  B- 
(iroup  III. 

The  di^tinjTiii,*lnng  feature  of  tliis  small  group  is  the  minute  size  of 
the  species,  which  ent'T  it,  tliej  iiaving  2  mm.  as  a  maximum  limit 
of  leugtli.  It  nuiy  be  considered  nunatural  to  constitute  a  grcjup  upon 
the  ([luility  of  size  alone,  but  as  this  serves  to  identity  tliem  readily, 
it  is  adopted  for  convenience. 

The  following  table  shows  the  arrangement  assumed  for  our  three 
species : — 

Transverse  carinae  of  abdomen  not  cusped. 

Head  as  wide  as  the  elytra.     Lake  Superior  to  Massachusetts. 

Ii3.  piisio. 
Head  narrower  than  the  elytra  ;  uku'c  rol)UHt ;  elytra  relatively  longei'  and 

more  n^ctangular.     British  Columbia (14.  nailllllls. 

Transverse  carinae  tricusjiid  :   form  much  nwvc  slender. ..(1.5.   atoiliai'ills. 


<J3.  §.  iiusio  n.  sp.  (Schwarz  MS.). — Form  robust.  I'ubescence  short, 
fine,  sparse,  setiform,  cinereous.  Head  robust,  twic(i  as  wide  as  long;  inter- 
ocular  surface  nearly  Hat,  more  than  twice  as  wide  as  the  eye,  somewhat 
finely,  very  closely,  and  evenly  jmnctate  ;  punctures  closely  crowdeil,  slightly 
polygonal  in  outline  ;  longitudinal  elevation  narrower  than  tin;  lateral  por- 
tions, strongly  an<l  evenly  convex,  promintuit ;  ocular  lines  nu>eting  at  one 
length  in  advance  ;  antennae  scarcely  as  long  as  the  width  of  head,  rather 
robust,  piceous-black,  club  i)rominent ;  tliird  Joint  one-fourth  as  lonj,:  again 
as  the  fourth,  joints  three  to  five  uniformly  decreasing  in  length,  s'x  and 
seven  oval,  eighth  globular,  narrowei'  than  the  seventh,  joints  nine  a'ld  ti>n 
broader  than  long,  last  as  wide  as  long,  feebly  acuminate  ;  maxillary  palpi 


1 


COLEOPTERA. 


H3 


jiiccous,  translucent,  first  joint  and  liasn  of  the  second  rufo-testaceous.  Pro- 
thorax  robust,  widest  at  tlie  middle,  where  it  is  four-iifths  as  wide  as  tlie 
liead,  and  sliphtly  broader  than  long;  sides  tlitnice  rather  stronjrly  conver- 
gent j)osteri(irly  and  feebly  sinuate;  anterior  niai'giii  slightly  lunger  and 
more  arcuate  than  the  posttM'ior  ;  surface  slightly  and  obliijuely  undulated 
at  the  sides  above,  rather  coarsely,  veiy  closely,  somewhat  irrt^gularly  and 
variolattdy  punctate  :  canaliuulation  almost  entirely  absent,  only  faintly 
seen  as  a  feeble  erosion  at  the  middle,  and  close  to  tln^  base.  Elytra  at  base 
as  wide  as  the  head,  sides  moderately  divergent  posteriorly,  very  slightly 
longer  than  the  width  at  base,  almost  straight ;  together  very  broadly,  tri- 
angularly and  moderately  eni.irginate  jMisteriorly  ;  suture  nearly  one-fourth 
as  long  again  as  the  pronotum  ;  surface  nearly  evenly  and  moderately  con- 
vex, somewhat  coarsely,  very  closely,  rather  deeply,  and  evenly  punctate. 
Abdominal  segments  decreasing  arcuatidy  in  width,  first  as  wide  as  the  con- 
tiguous elytra  ;  surface  fetddy  convex,  coarsely  and  very  (dosely  puncuilate  ; 
transverse  carinae  not  ousped,  finely  and  unevenly  undulated.  Legs  shoi-t 
and  stout,  dark  jiiceous-bro^t-n  aliove,  paler  and  rufo-jiii.'eous  beneath  ;  first 
joint  of  posterior  tarsi  four-fifths  as  long  again  as  the  second,  as  long  as  the 
last,  second  very  slightly  longer  than  the  third. 

Mule. — I'ostiM'ior  edg<'  of  the  fifth  ventral  segment  entire  ;  sixth  segment 
broadly  bilobed  at  ajiex,  cusp  very  slightly  rounded  an<l  viu'v  short,  arms 
widely  diverging. 

Female. — Sixth  ventral  segment  broadly  truncate  at  tip,  truncation  slightly 
arcuate. 

Lengtli  1.8-1.0  nnn. 

Cambridge,  Massacliiiscifs,  (i ;  Canada,  2;   Lake  Superior,  2. 

Tile  parasite  of  tliis  sju'cies  is  very  large,  being  nearly  as  large  as 
the  eye  ;  its  eontour  is  nearly  circular ;  the  surface  is  very  convex 
and  most  higidy  polislied  ;  it  is  i)ale  rut'o-testaceous  in  color,  and  the 
abdomen  is  provided  with  very  long  cinereous  setae,  which  project  as 
a  fringe  far  behind  tiie  body;  two  symmetrically  placed,  pigmental 
dc|iosits,  situated  near  the  anterior  border,  are  presumably  the  eyes. 
Tlie  type  specimen  iieai's  two  of  thes(^  huge  jiarasites,  whicli,  if  we 
should  magnify  the  beetle  to  the  si/e  of  tlie  human  body,  would  be 
six  inches  long. 

This  small  species  has  a  very  wide  range  in  its  geographical  distri- 
bution ;  it  appears  to  be  (piile  rare,  however,  in  all  its  localities.  It 
varies  in  the  color  of  the  jialpi  and  length  of  the  first  joint  of  the 
posterior  tarsi,  so  that  1  at  first  described  the  specimen  from  Canada 
and  Lake  (Superior  as  distinct  sjiecies,  but  afterwards  concluded  to 
unite  them,  because  of  the  insullicient  material  lit  hand. 

ti4.  S.  Iiaiiullis  n.  sp. — Form  moderately  robust.  Pubescence  sparse, 
fine,  moderately  long,  semi-erect,  pale  rtavo-testaceous.  Head  moderate, 
robust,  scarcely  twit'e  as  wide  as  long  ;   interocular  surface  feebly  convex, 


Ml 


ii 


;nl!^  ilH 


hailfM 


Hi 


NOKTII     AMKKKAN 


twice  as  wide  as  tlie  t'.v<',  ('(lually  trilolicd  by  tlic  vury  feeble  suleatioiis  : 
inteiinefliate  Hiirfaee  very  acutely  and  stroiij;ly  convex  ;  punctures  .small, 
close,  isojateil,  evenly  distributed  ;  ocular  lines  meeting  at  less  tlian  one 
length  in  advance;  antennae  shorter  than  the  width  of  head,  ratlier  r(d)ust, 
black,  club  distinct  ;  third  and  fourth  joints  ecpial,  fifth  and  sixth  shorter, 
equal,  eighth  but  very  slightly  shorter  and  rather  less  robust  than  the 
seventh,  joints  of  club  dark  jiiceous-brown,  increasing  rajiidly  in  length  and 
tliickness,  very  sparsely  pubescent ;  maxillary  palj)!  moderate,  piceous-black, 
lirst  joint  dark  i)iceo-testaceous,  third  somewhat  robust,  compressed.  Pro- 
thorax  very  robust,  arcuati  ly  and  very  raiiidly  widening  to  the  middle,  where 
it  is  live-sixths  as  wide  as  tlie  bead,  and  distinctly  wider  than  long;  sides 
thence  rather  rapidly  convergent  and  very  feebly  arcuate  ;  anterior  and 
jiosterior  margins  nearly  e(iual  in  length  and  curvature;  surface  very  fe(d)ly 
and  obli(iuely  tnberculate  near  the  basal  angles,  just  j)erceptibly  and  trans- 
versely impressed  immediately  beiiind  the  anterior  margin  ;  very  liuely, 
rather  fe(d)ly,  very  closely,  evenly,  hut  somewhat  confusedly  punctate,  inter- 
spaces very  indistinctly  granulate.  Elytra  at  base  very  slightly  wider  than 
the  ln'ad  ;  sides  feebly  divergent  j)osteriorly,  distinctly  longer  than  the  width 
at  base,  and  feebly  <ircuate  ;  together  rather  narrowly,  roundly,  and  dis- 
tinctly emarginate  behind  ;  suture  one-thiid  as  long  again  as  the  proiiotiim  ; 
surface  rather  dejiressed  and  even  ;  modeiately  coarsely,  V(My  closely,  deeply, 
and  evenly  luinctate,  interspaces  narrow  and  highly  polished,  very  fetd)ly 
reticulati'd.  Abdominal  segnients  decreasing  ra))idly  and  slightly  ariuately 
in  widtii,  lirst  as  wide  as  the  contiguous  elytra  ;  surfaci'  broad,  feebly  convex  ; 
coarsely,  very  closely,  and  evenly  punctulate,  becoming  much  more  finely  so 
toward  the  tip  ;  transverse  carinae  not  ciisjied,  finely  and  acutely  (tentate, 
inttM'vals  evenly  rounded.  Legs  short,  slender,  black  above,  dark  jiiceous- 
brown  beneath  :  first  joint  of  jxistevior  tarsi  four-lii'ths  as  long  again  as  the 
second,  eipial  in  length  to  tlie  fifth,  second,  third,  and  fourth  joints  uniformly 
and  gradually  decreasing  in  length.  Under  surface  of  the  abdomen  j)olished, 
black,  rather  sparsely  and  somewhat  coarsely  punctulate. 

Male. — Fifth  ventral  segment  not  perceptibly  modilicd  ;  sixth  sinuate  at 
the  tip,  sinus  occupying  nearly  the  entire  segmental  apex,  evenly  rounded, 
and  about  eight  time!-:  as  wide  as  deep. 

luiimlc. — IJ  nk  nown . 

Length  1.9  mm. 

British  Coliimbiii,  2. 

Tiic  observutioii  oonccriiinn;  tlie  sexual  modifiention  of  the  si.xtli 
ventral  sejinient  is  ojien  to  a  little  doubt,  owing  to  the  diiniaged  con- 
dition of  the  type  speeiinen. 


6r».  S.  atOIIiarillN  n.  sp. — Form  slender.  Pubescence  almost  completely 
invisible,  except  toward  the  borders  and  tip  of  tlie  abdomen,  where  it  is 
exceedingly  short,  setiform,  sub-recumbent,  cinereous,  and  rather  sjiarse. 
Head  moderate,  twice  as  wide  as  long  ;  int(^rocular  surface  iiottwice  as  wide 
as  tlie  eye,  flat ;  eciually  trilobed  by  the  very  indistinct  sulcations  ;  jjunctures 
coarse,  deep,  very  closely  approximate,  evenly  distributed  ;  ocular  lines 
meeting  at  less  tlian  one  length  in  advance  ;  antennae  very  slightly  longe 


COI.KOl'TKUA. 


85 


than  the  wiilth  of  licail,  tilai^k,  sIcikIit,  cliili  disliiicf  ;  joints  tlircc,  four,  and 
five  (li'dfasinj;  very  uiiif'ornily  in  l('u;,'tli,  luit  with  cxci'ssivc  slowni'ss,  sixtli 
and  seventh  ahniptly  shorter,  equal  in  hMij,'tli,  the  Ijltter  much  thicker, 
ei<;litli  sli^;litly  hroader  than  hinj;,  last  joint  as  lonj;  as  tiie  ninth  and  tenth 
toi^ether,  much  thicker;  maxillary  [lalpi  rather  short  and  slender,  dark  red- 
dish-lilai  k  throughout.  Prothorax  widest  at  the  miildle,  wliere  it  is  three- 
f'ourtlis  as  wiih'  as  t!ie  head,  and  very  sliu'htly  narrower  than  long  ;  sides 
thence  moderattdy  converj^ent  jiosteriorly  and  nearly  straijrht  ;  anterior  mar- 
gin sli}{htly  short((r  and  more  arcuate  than  the  jiosterior  ;  surface  nearly 
evenly  convex,  finely,  deeply,  very  closely,  evenly,  hut  somewhat  confusedly 
punctate,  interspaces  distin(ftly  granulate;  canaliculation  (\\treniely  narrow 
and  indistini't,  hegiuning  at  the  middle  and  extending  nearly  to  the  hase. 
Elytra  at  base?  as  wid(i  a.s  the  head  ;  sides  very  feehly  divergent  posteriorly, 
very  slightly  longer  than  the  width  at  hase,  very  feehly  arcuate;  broadly 
and  somewhat  feehly  emarginate  hehind  ;  sutur(!  just  perce]itihly  longer 
than  the  pronotum  ;  surfaces  evtaily  and  mod<M-ately  convex,  rather  coarsely, 
very  closely,  and  somewhat  confusedly  punctate,  int<!rspaces  coarstdy  granu- 
late. First  three  ahdominal  segn\ents  suh-e(nial  in  width,  as  wide  as  the 
contiguous  elytra  ;  surface*  not  strongly  convex,  closely,  evenly,  and  coarsely 
punctulate  ;  transverse  carinae  unicnsi)id,  cnsp  very  long,  strong,  becoming 
fincdy  acuminate  ;  tliere  are  als()  slight  traces  of  lateral,  ruilimentary  cusjis 
on  souieof  the  segments.  Legs  moilerate  in  length  and  rathei'  slender,  dark 
rufous  above,  i)aler  beneath,  tarsi  darker;  first  joint  of  the  posterior  tarsi 
f>ne-half  as  long  again  as  the  second,  three-fifths  as  long  as  the  last,  joints 
two  to  f(iur  uniformly  and  very  gr;idually  decieasing  in  length. 

Mull'. — Posterior  edge  of  the  fifth  ventral  segment  very  feebly  etnarginate 
in  its  mi(hlle  fourth,  eniargination  evenly  rounded  and  just  perceptible, 
contiguous  surface  feebly  fiattened  ;  sixtli  segment  sinuate  at  apex,  sinus  as 
broad  as  the  apices  and  equal  to  them  in  curvature,  evenly  rounded,  some- 
what more  than  three  times  as  wide  as  deep. 

Fvmttlfi. — Sixth  segment  evenly  rounded  behind. 

Length  1.7  mm. 

Detroit,  ]\Iicliip:an,  1  ;  Cainbriiljxc  ^lii.asaclmsctts,  l.T. 
TIk!  slender  jTraeel'iil  form  of  tliis  species,  tlio  most  minute  of  llic 
genus,  will  retulily  distinguish  it  from  the  two  preceding  ones. 

Subdivision  y. 

Prothorax  not  canali(uilated.     Elytral  sculpture  as  in  subdivision  |3. 

In  order  to  tell  whether  the  jtrotliorax  is  caualiculated  or  not,  the 
insect  should  be  held  in  such  u  way  that  the  light  may  pass  very 
obliipiely  or  tangentially  across  the  highest  point  of  the  pronotum, 
and  perpendicularly  to  tlie  longitudinal  axis.  If  there  be  a  deeply 
impressed  or  excavated  channel,  it  will,  of  cotuse,  be  evident  without 
this  test,  but  if,  when  held  in  the  position  above  described,  there  lu* 
no  sign  of  even  a  narrow  longitudinal  shade,  the  pronotum  will  be 


'•'m 

:>it 

■    ! 

1   '               '■ 

y. 
}  ■ 

'  -A 

>    '■ 

iii,i 

k  m 

Wj; 

\n  i|i|| 

HI 

\i 
m 


.1,- 


80  NORTH    AMERICAN 

considered  not  eiitijilienliited  ;  on  tlie,  contniry,  lio\V(^ver,  it"  tliere  be  a 
t'jiint  siiiidow  extending:;  aloii;^  the  middle  o\'  the  disli,  giving  ii  decided 
suspicion  of  n  I'eehle  iinfu'ession  in  tliiit  direction,  the  student  should 
consult  the  tables  given  under  subdivision  )3. 

This  minuteness  of  detail  is  rendered  necessary,  for  the  reason  that 
there  is  no  natin-al  tlivision  of  species  according  to  this  character,  and 
forms  gradually  blend  from  one  subdivision  into  the  other,  although 
tlie  character  is  nearly  constant  in  individuals  of  the  same  species. 

The  following  tabular  arrangement  may  be  ado[>te<l  at  present  : — 

Ti'jinsviTsc  caiiiiac  of  al)il(iiiii'ii  4-(_-iisi)iil. 

Klslral  suture  in  Iciigtli  t'i|iial  to  nr  shorter  tlian  the  pronotuiu. 
Large  species,  4.0  uiiii.  in  len;,'tli. 

First  joint  of  the  jiosterior  tarsi  one-tliird  longer  than  the  secoiiil. 

(i(i.  virgin iae. 
First  joint  of  tlie  posterior  tarsi  tlirei'-l'ourtlis  longer  tlian  tlie  seeond. 

(IT.  texaniis. 

STiialt  si)eeies,  2.S  nnn.  in  lens^tli fi8.   veilUstlls. 

Klytral  suture  longer  than  the  jirountuni. 

.•\l)(loniinal  segments  as  broad  as  tlm  contiguous  elytra;  sides  jtarallel 

and  continuous  with  tiiose  of  the  elytra (il).  OCCideiltillis. 

Abdominal  segments  narrower  tlian  tlie  contiguous  elytra  ;  siiles  more 
or  less  convergent  posteriorly. 
Pubescence  of    abdomen    long,   fine,   sparse,   and    recumbent,   rather 
conspicuous  ;    surface  of  elytra  very  irregularly  and  conspicuously 

channeled 7ll.  pacific  IIS. 

Pulx'scence  finer,  shorter,  not  at  all  prominent. 

Sides  of  pruthorax  undulated  anteriorly 71.  obntl'lisiis. 

Si<les  of  prothorax  more  or  less  strongly  and  evenly  arcuate  ante- 
riorly. 
'  Longitudinal  elevation  of  interocular  surface  distinct,  somewhat 
conspicuous. 
Larger  species,  3.4  mm.  in  length  ;  head  small. 

Prothorax  widest  distinctly  in  advance  of  thii  mi(hlle.    Ariz(Hia. 

72.  arizoiiae. 
Prothorax  widest  slightly  behind  the  middle.    Massachusetts. 

73.  iiitcgei*. 

Smaller  species,  2.8  ram.     Head  barge.     Florida. 

74.  floridaiiiis. 

Longitudinal    elevation    of    interocular   surface   almost    obsoli-te, 

broadly  and  very  feebly  convex 75.  COloilllH. 

Transverse  carinae  of  abdomen  tricuspid. 

Elytral  suture  in  length  eiiual   to  or  shorter  than   the  pronotuni ;    head 
much  wider  than  the  idytra. 
Antcnnal  joints  three,  four,  and  five  nniformly  decreasing  in   length  ; 

legs  ])alu 70.  iiiaiiiiiiopa. 

Antcnnal  joints  four  and  live  equal  in  leugth  ;  form  more  rot>ust  and 
more  convex  ;  punctuation  much  coarser,  deeper,  and  more  distinct  ; 
legs  almost  black 77.  gravidlis. 


rOLKOl'TERA. 


87 


Klytral  suture  much  longer  than  the  pi'onotum  ;  hoail  iiiiU'h  iiarrowiT. 

I'i'othorax  distiiiittly  huigt'i'  than  wUh' 7>.  a  llillliltim. 

Prnthovax   as  wide   as   h)nij  ;    sides   very  strongly   and    nearly   evenly 

areiiate 7!'.  tiiiitiicollif;. 

Transverse  earinae  of  ali(loni(;n  not  cusped. 

Prothorax  liaving  throughout  its  basal   lialC  a  narrow,  (devaled,  longitu- 
dinal carina.     Laki'  Superior 80.  csiriiiil'ollis. 

Prothorax  without  carina.     Colorado 81.   iiisigiiis. 

(in.  S.  VirgilliaD  n.sp. — Form  ratine-  robust,  sides  parallel.  Pubescence 
rather  long,  coarse,  uuxlerately  abundant,  semi-erect,  pale  I'ulvous  on  the 
abdomen,  cinereous  on  the  remainder  of  thc^  upper  surface.  Head  rol)Ust, 
leather  large,  twice  as  wide  as  long  ;  interocular  surface  distinctly  depressed, 
bari'ly  twice  as  with;  as  the  eye;  e<jually  trilobed  by  the  sulcations.  which 
ar((  rather  deeji  and  prominent;  intermediate  surface  evenly  and  strongly 
convex:  punctures  deep,  round,  evenly  disti'ibuti'd  and  moderately  close; 
inti'rs[)aces  nearly  one-half  as  wide  as  the  jiunctures,  somewhat  coiivex,  liutdy 
reticulated  and  feebly  lustrous  ;  ocular  lines  meeting  at  one  and  one-half 
lengths  in  advance  ;  second  joint  of  antennae  longer  and  mon?  slender  than 
the  llrst;  maxillary  palpi  slender,  third  joint  piceous-black,  densely  clothed 
with  short  cinereous  pubescence,  scarcely  longer  than  the  second,  first  and 
second  joints  v(>ry  dark  piceo-testaceous,  paler  at  their  distal  extremities. 
Prothorax  large,  widest  slightly  befon'  the  mi(hUe,  where  it  is  more  than 
live-sixths  as  wide  as  tlie  head,  and  one-sixth  narrower  tlian  long:  sides 
thence  very  moderately  convergent  jxisteriorly  and  strongly-  sinuate  ;  anterior 
nuu'gin  slightly  longer  and  more  arcuate  than  the  posterior  ;  surface  strongly 
tubereiilate  at  a  short  distance  from  each  basal  ang'.e  ;  rather  finely,  deei)ly, 
very  closely,  and  extremely  confusedly  punctate,  inters})aces  very  fe(dily 
lustrous.  Elytra  at  base  slightly  nari(.wer  than  the  head  ;  sides  very 
strongly  divergent  jiosteriorly,  as  hnig  as  the  width  at  base,  very  strongly 
and  evenly  aii'uate  :  togetiier  very  broadly,  roundly,  and  strongly  emargi- 
nate  behind  ;  suture  e<[ual  in  length  to  the  i)roiiotum  ;  surface  convex,  feebly 
iinpr-'ssed  on  the  suture  at  the  base,  somewhat  coarsidy  and  closely,  deeply, 
and  very  irregularly  punctured  and  channeled  ;  interspaces  minutely  graj.'u- 
lose  or  scabrous,  very  feebly  lustrous.  Abdominal  segments  decreasing 
uniforndy  and  just  jierceiitihly  in  widtli,  first  distinctly  narrower  than  the 
<'ontiguous  elytra  ;  surfac<?  coarsely,  feelily,  sul)-vai'iolately  iiunctulale,  puiu;- 
tures  very  close  toward  the  borders,  less  crowded  toward  the  median  line, 
interspaces  shining  ;  transverse  carinae  arcuate  post<'riorly,  4-cuspid.  cusps 
all  small,  coarsely  acuminate,  sonunvhat  rudimentary.  Legs  moderate, 
slender,  piceous-ljlack  above,  dark  jiiceo-fuscous  beneath  and  toward  the 
tips  of  the  tibiae,  tarsi  slender;  first  joint  of  the  posterior  tarsi  scarctdy 
more  than  one-third  longer  than  the  second,  slightly  shorter  than  the  fifth, 
second  somewhat  shorter  than  the  third  and  fourth  together. 

Mule. — Unknown. 

Female. — Sixth  ventral  segment  very  broad  and  evenly  rounded  InOiind. 

Length  4.1)  mra. 

Pennington  Gup,  Virginia,  1. 


4 


«K 


NORTH    AMKRICAV 


This  (iiif  species  is  very  (iistinct  by  rciisoii  of  tlie  iieculijir  elytral 
.struclure  ;  tlie  coarse  piiheseeiief!  mid  ;;eneriilly  seal'ioiis  appeanince, 
recall  very  forcibly  tlic;  sti'iietiire  of  uti/f/inis  Say. 

U7.  S.  tcxaillls  n.  sj>. — Foiin  robust,  sides  pjiialli'l.  I'libi'sci'iicf  iiioili'- 
riilfiy  i<iiij;,  spaise,  coai'se,  st'ini-erect,  pjili'  fiilvo-  uuercous.  Head  iiiinliTiitc, 
twice  as  -wide  as  loiij^  ;  interoiMilar  surface  ratlu!r  depresscil,  u(it  twic(v  as 
wide  as  th(?  eye,  equally  trilolied  iiy  the  rounded  sulcations;  intermediate 
surface  UKxlerately  convex,  punctures  coarse,  isolated,  ev(>nly  distriliuted, 
close;  ocular  lines  meetiiij,'  at  aliout  two-tliirils  of  a  length  in  advance; 
second  joint  of  antennae  distinctly  shorter  and  narrower  than  the  first,  third 
oMe-lialf  as  Ion?;  ;ii;ain  as  tlie  second,  all  piceous-lirowii.  Prothorax  uniformly 
and  arcuately  wideniuf;  to  a  point  two-thirds  of  thi'  lent,'tli  posteriorly,  wlieie 
it  is  live-sixths  as  wide  as  the  head  and  clistinctly  narrower  than  Ion;;; 
sides  thence  moderately  converjient,  short,  and  distinctly  sinuate;  anterior 
niar;,'in  niiK'h  shorter  and  very  mich  niort?  arcuate  than  the  jxisterioi' ;  sur- 
face feebly  tuberculate  near  th(!  li;isal  angles,  a)id  very  feebly  swollen  near 
the  apical  angles,  also  very  feelily  and  transversely  imiiri'ssed  just  hi'hind 
the  anterior  margin,  rather  finely,  very  closely,  and  extremely  irregularly 
punctured  and  channeled.  Elytra  at  base  slightly  narrowei'  than  the  head; 
sides  feebly  divergc^it  posterioi'ly,  about  equal  in  length  to  the  widtli  at  base, 
strongly  arcuate  ;  together  very  broadly,  roundly,  and  rather  strongly  emar- 
giii.ite  behind  ;  suture  very  slightly  shorter  than  the  jironotuni  ;  surfac(f  very 
feebly  and  narrowly  impressed  along  the  suture  toward  the  base  ;  coarsely, 
in  general  closidy  and  very  irregularly  punctured  and  channeled  ;  near  the 
suture  and  in  front  of  the  centre  the  channels  are  very  close  and  outwardly 
oblique,  behind  the  centre  inwardly  oblitjue  ;  the  punctures  are  usually 
isolated  by  their  own  widths  toward  the  outer  ajiical  angles,  and  coarser, 
distinct,  but  polygonally  compressi'cl  toward  the  bases,  interspaces  jxilished. 
Abdominal  segments  decreasing  uniformly  in  wiiltli  and  with  extrenu^  slow- 
ness, first  very  slightly  narrower  than  tin?  contiguous  elytra  ;  sides  nearly 
parallel  ;  surface  moderately  convex,  coarsely,  rather  closely,  and  evinily 
punctate;  transvt^rse  carinae  4cus}iid,  cu;ips  equal,  short  and  rudimentary 
on  the  first  two  segments,  longer  and  more  acicular  on  the  third  and  fourth. 
Legs  rather  short  and  slender,  dark  piceous-brown  above,  rather  paler  rufo- 
piceous  beneath;  lirst  joint  of  the  posterior  tarsi  three-fourths  as  long  again 
as  the  second,  very  slightly  shorter  than  the  last,  second  joint  nearly  one- 
half  as  long  cagain  as  the  third,  fourth  short,  thin,  and  obliijue,  tiftli  much 
narrower  at  base  than  at  apex. 

Mule. — Unknown. 

Female, — Sixth  ventral  segment  abruptly  much  narrower  than  the  fifth, 
evenly  rounded  behind. 

Length  4.0  mm. 

Columbus,  Texas,  1  ;  Western  State-  (locality  unknown),  1. 
Tiie  antennae  and  ptilpi  are  missing. 

This  species  greatly  resembles  vir(jitila>,  but  ditiers  from  that  species 
in  the  somewhat  longer  elytra,  which  art;  much  more  narrowly  emar- 


COI.KOl'TKUA. 


8i) 


giiiiitc!  ht'liiiid  ;  in  its  iniurli  more  I'obiist  form,  aiitl  in  tin*  nion*  sijiirse 
and  li'fis  conspicuous  piilx'sccnce. 

(i8.  S.  veiillHtllS  11.  sj). — l-'iirm  slender.  Piiliesceiife  sliort,  seini-erei't, 
line,  ciiicrcdiis,  very  sixirse,  ex<'e(it  ut  tlie  sidi's  iuiil  tnward  the  tip  cit'  tin- 
ubiloinen,  wliere  it  in  sli;,'lit]y  iimre  i)leiitit'ul.  Head  sin.'ill  l)iit  rubiist, 
scnrcM'ly  twice  as  wide  as  lonj,'  ;  iiiteroeular  siiit'Mee  ueaily  flat,  very  slij^litly 
more  tliau  twice  as  widi^  as  the  eye;  "(lualiy  trilnlied  l>y  tlie  ratlier  teidile 
longitudinal  sulcations  ;  iiiterinediato  surface  very  l'e(ddy  and  evenly  (Miiivex  ; 
punctures  extreiu(dy  coarse,  moderately  close,  dee]),  rounded,  and  evenly 
distriliuteil  ;  interspaces  narrow,  very  convex,  and  vei'y  lii^;lily  jxilislied  ; 
ocular  lines  meeting;  at  about  one  and  two-thirds  lenjiths  in  advance;  antennae 
longer  than  the  width  of  head,  dark  iiiceous-lirown,  neai'ly  black  at  base, 
slender,  club  distinct;  third  joint  one-fourth  as  long  again  as  the  fourth, 
fourth  and  (Iftb  eijual,  seventh  thicker  and  very  slightly  shorter  than  the 
sixth,  eighth  distinctly  elongate,  oval,  thicker  than  th(^  seventh,  joints  of 
club  increasing  uiiiforinly  in  length,  last  two  (Hjiial  in  thickness,  last  joint 
acuminate  at  tip;  maxillary  palpi  slender,  dark  piccons-bniwn  throughnut. 
Prothorax  wiilest  slightly  behind  the  middle,  whcic  it  is  nearly  four-lifths 
as  wide  as  tln^  head,  and  ;ib(iut  one-sixth  nairower  than  long  ;  sides  tlienci) 
feidily  convergent  jiosferiorly,  sinuate  ;  siiles  undulate  throughout  their 
length:  iinti'rioi'  margin  slightly  shorter  and  much  more  arcuate  than  the 
posterior;  surface  rather  feebly  and  longitudinally  tubeiculate  near  the 
basal  angles  ;  juinctiires  (dose,  unevenly  distriliuteil.  coarse,  impressed, 
somewhat  irregular  in  outline;  intersiiaces  highly  iiolished,  moderately  con- 
vex. Elytra  at  base  about  as  wide  as  the  head;  sides  moderately  divergent 
posteriorly,  slightly  longer  than  the  width  at  base,  almost  straight :  together 
broadly,  somewhat  angularly,  and  rather  strongly  eniarginate  behind  ;  suture 
ecpial  in  length  to  the  pronotum  ;  surface  somewliat  depressed,  fe(d)ly  and 
narrowly  inijiressed  along  the  suture  ;  outside  of  the  sutural  impressed  area 
the  punctures  are  very  feebly  impressed,  somewhat  distant,  nearly  evenly 
distributed,  seldom  coalescent,  interspaces  feebly  convex  and  very  highly 
polislurd  ;  within  the  imju-essed  area  tlie  surface  is  rather  clostdy  and  con- 
fusedly chamnded.  Abdominal  segmcnits  decreasing  uniformly  and  extremely 
gradually  in  width,  first  as  wide  as  the  contiguous  elytra  ;  surface  highly 
polished,  moderately  convex,  finely  and  very  distantly  jjunctulate  along  the 
middle,  more  closely  so  toward  the  borders  ;  transverse  carinae  4-cuspid, 
cusps  eiiuidistant,  etiual  in  length,  long,  very  finely  aciciilate,  rather  jn'omi- 
nent.  Legs  short  and  slender,  bla(-k,  tibiae  and  tarsi  pieeoiis-black  beiu'ath  ; 
first  joint  of  the  posterior  tarsi  three-fourths  as  long  again  as  the  second, 
very  much  shorter  than  the  fifth,  joints  two  to  four  uniformly  and  rather 
rapidly  decreasing  in  length. 

Mule. — Fifth  ventral  segment  not  modified  ;  sixth  very  broad  at  apex, 
broadly  and  feebly  sinuate,  sinus  and  apices  about  equal  in  width  and  cur 
vature,  sinus  eight  times  as  '^■'ide  as  deep. 

Female. — Unknown. 

Length  2.8  mm. 

Locality  not  given  ;  marked  558  (Schwarz). 


90 


NORTH    AMKItK  AN 


III  fliis  form  Mic  clytnil  s('iil|itiir<'  ditVcrs  tVoiii  iiiiy  yd  oxamiiu'd, 
iiiid  it  ciinnol,  I'ail  to  lie  readily  (lisliii;j;iii>li('d.  'I'lio  eyes  arc  very 
|ialf  :  till'  fxplaiiaiioii  ul  tliis  (■(iiidilioii,  wliicli  a|i|)oai's  to  lie  more  or 
less  8|M'cilic,  is  somewliat  obscure. 


tlO.  S.  occideiltulis  n.  sp.  (("rotdi  MS.). — l"'<inii  iiidilcriitfly  nilmst  ; 
sides  iiciiily  jijiralld.  l'ii))es(  cncc  iiiddcratcl  v  slmrl,  rather  s|i;use,  liiie, 
siib-iiMiiiiilieiit,  sctifonii,  jiiid  ciiiercoiis.  Head  modeniti',  sliglitly  iiiore 
tli.'in  'wife  as  wide  (is  loiif;  ;  interi)cuiai'  siirt'aeu  vi'ry  feebly  convex,  more 
tiiau  twice  as  wide  as  the  eye;  rather  lliicly,  closely,  aii<l  evenly  punctate, 
punctures  rounded;  sulfations  hroadiy  rounded,  t'eidile  ;  iiitciiuediate  sur- 
face broader  than  the  lateral  jiortions,  evenly  and  nioderjitoly  convex  ;  ocula'' 
lines  ineetiiif^  at  one  leii;,'th  in  advance;  antcunae  as  lonj;  as  the  width  of 
head,  very  niodeiattdy  ndmst,  dark  jjiceous-hidwn,  hasjil  joint  blaik,  cluh 
moderate;  third  joint  scarcidy  more  than  one-tilth  as  loiif;  af,'ain  as  the 
fourth,  foiirtb  and  tilth  e()ual,  sixtli  and  seventh  shorter,  ecjual  in  li'ni;tli, 
tbe  latter  the  more  roluist,  ei^'hth  one-lialf  loiifjer  than  wide,  joints  of  club 
increasing  very  gradually  in  leiigtli,  the  last  two  thicker  and  of  eiiual  width  ; 
maxillary  palpi  slender,  ])iceoits-brown,  slightly  paler  towanl  tbe  base. 
Prothorax  arcuately  and  gradually  widening  t<i  a  point  W(dl  behiml  tbe 
middle,  where  it  is  live-sixths  as  wide  as  tbe  bead  a  id  distinctly  narrower 
than  long  ;  sides  tlieiico  ratber  rapidly  convergent  posteriorly  ami  strongly 
sinuate;  anterior  margin  very  slightly  slmrter  and  mucb  more  arcuate  tliau 
tbe  posterior  ;  surface  liiiely,  generally  ( losely,  and  very  irregularly  punctate  ; 
punctures  isolated  and  ciicnlar  in  outline  near  the  middb',  closely  crowded 
and  transversely  coab-scent  near  tlui  base;  ratber  strongly  and  minutely 
tubcrculate  near  the  basal  angles  ;  along  the  middle  tow  aid  tbe  base,  there  is 
an  arrangement  of  punctures  somewhat  resembling  a  canalif illation.  Elytra 
at  base  as  wide  as  the  head  :  sides  ratber  strongly  divergent  jiosteriorly, 
sliglitly  longer  than  the  width  at  base,  fecdily  arcuate,  most  strongly  so  be- 
bind  ;  together  broadly,  roundly,  and  distinctly  emarginate  hchiud  ;  suture 
very  sliglitly  longer  tban  the  proiiotum  ;  surface  very  fetdily  impressed  along 
tbe  suture  toward  tbe  base,  ratber  linely,  very  closely,  deeply,  and  irregu- 
larly puiiftured  and  cbaiinided,  channels  generally  arcuately  arranged  near 
tbe  suture,  more  or  less  convergent  toward  tbe  inner  apical  angles.  Abdo- 
minal segments  decreasing  uniformly,  tbongh  just  perceptibly,  in  width,  lirst 
very  sliglitly  wider  tban  tbe  contiguous  elytra  ;  surface  very  broad  and  feebly 
convex,  linely,  veiy  feebly,  somewhat  distantly  anil  irregularly  ]iuuctulate ; 
transverse  carinae  4-cuspid,  cii.-ips  nearly  eiitial  in  length,  rather  short,  linely 
aciculate,  widely  separated.  Legs  moderately  sbort  and  sbiider,  black 
above,  very  dark  ])ifeous-brown  licneatb  ;  first  joint  of  the  posterior  tarsi 
very  slightly  longer  tban  the  second,  sbortiu'  tban  tbe  last,  second  and  third 
joints  sub-equal  ;  tarsi  robust. 

^f<ll(^, — Fifth  abdominal  segment  not  modified  ;  sixth  broadly  and  deeply 
sinuate  at  apex,  sinus  somewbat  broader  tban  tbe  apices,  more  acutely 
rounded  at  tbe  bottom  tban  at  tbe  sides,  nearly  five  times  as  wide  as  deep; 
seventh  segment  narrow  at  tip,  wbere  it  is  feebly  and  very  evenly  emarginate. 

FtiiHilii. — Sixth  ventral  segment  very  broadly  and  evenly  rounded  behind. 

Leiigtli  3.0  mm. 


rOLKOI'TKRA. 


01 


Lako  QiiesncI,  Hritisli  Coliiiiiliiii,  17. 

This  species  is  cliariicterized  liy  ii  very  Itroail  jilMlomeii  ;  tlie  first 
joint  (if  tlie  liiiid  tarsi  seems  to  he  sii^iitiy  variaide  in  l(ii;.'lli. 


71).   N.  iiacinniH 


sp.   (Crotch    MS.). — Funii    inoih'i-.itcly    slcinh 


I'lil. 


I'Mic   Iciii;;,   line,   I'l'illiiT   siiarsi'   on   tlic   |)r(itlioi;ix    anil   dvtra,  dcnst; 


towaid  tlio  siili's  and  vcitcx  of  llio  alHlonien,  siili-i'ci'uiiiln'nt,  pale  llavo- 
fincii'ons.  Head  small,  t«i(!H  as  wiili^  as  lon^' ;  intcidcnhir  surt'ai'i-  llat, 
sli;,'litly  niori:  tlian  twice  as  wiiln  as  the  eye  ;  ciinally  trilobcil  by  the  roundccl 
lint  distinct  siilcati(Mis  ;  intcnnciliatc  snrfacc  evenly  an<l  ratliiT  stroniily  con- 
vex ;  punctures  deeply  impressed,  distant,  and  rather  evenly  distrilinted, 
slij^litly  doner  toward  the  eyes;   interspaces  feebly  convex   and  very  lii;;lily 


ilislied 


liar  Ii 


eti 


;at 


h'liat  h 


th 


1  lenu'th 


•  Hnnit 

antennae  sliiihtly  lonf,'er  tlian  the  width  of  head,  ]iale  piceoiis-brown,  lirst 
joint  daiker,  sleniler,  dill)  distinct  ;  thir<l  Joint  one-third  as  Ion;,' a^'ain  as  the 
fourth,  fourdi  and  (Ifth  tupial,  sixth  lon;:er  ami  niuuh  less  robust  than  the 
seventh,  eif;hth  slii;htly  more  robust  thau  the  seventh,  perceiitibly  elonjiated, 
oval,  joints  of  duli  incicasini,'  slightly  in  length,  nearly  of  eijiial  tliickness  ; 
m.ixillary  palpi  piccoushlack,  fii'st  joint  dark  piceo-testaeeous.  Prothorax 
arcliately  and  very  gradually  widening  to  a  |)oiiit  slightly  behind  *'  •  middle, 
where  it  is  live-sixths  as  wide  as  the  head  and  one-sixth  nariower  than  long  ; 
sides  thence  very  feebly  i;onvergent  and  ilistinctly  sinuate  ;  anterior  and 
posterior  margins  ('(pial  in  length,  the  former  slightly  the  more  arcuate; 
.surface  rather  coarsely,  closidy,  and  irregularly  punctate,  ])uin'tures  rounded, 
impressed,  and  often  conllinjnt  near  the  margins,  rather  distant  in  the  middle, 
interspaces  liighly  polisiied.  Elytra  at  base  as  wide  as  the  head  ;  sides 
moiierately  divergent  posteriorly,  slightly  longer  than  the  width  at  base, 
and  rather  strongly  arcnatt;  ;  together  broadly  and  very  fecdily  emarginate 
bidiind  ;  suture;  one-lifth  as  long  again  as  the  pronotuni ;  surface  convex, 
just  jierceptibly  and  narrowly  impresseil  along  the  suture  toward  the  base, 
with  a  very  feeble  impression  just  behind  and  exterior  to  the  centi'e  of  each 
elytron,  extrenndy  irregularly,  confusedly,  coarsely,  rather  idos(dy  jnmctured 
and  channeled.  Abdominal  segments  decreasing  uniforndy  and  rather 
gradually  in  width,  lirst  just  ])erceptibly  narrower  than  the  contiguous 
elytra;  surface  strongly  coiivex,  highly  polished,  very  tnudy,  distantly,  .'ind 
evenly  punctulate  ;  transverse  carinae  4-cusiiid,  cusps  equal  in  length,  rather 
short,  becoming  aciculate  toward  tips,  middle  ones  more  distant  th;in  the 
lateral.  Legs  rather  short  and  slench-r,  piceous-black,  un(b'r  surfac(Mif  tarsi 
slightly  paler  ;  first  joint  of  posterior  tarsi  four-fifths  as  long  again  as  the 
second,  slightly  shorter  than  the  last,  second  and  third  suliequal. 

Mule. — Sixth  ventral  segment  very  broadly  sinuate  at  apex,  sinus  nnidi 
broader  than  the  apices,  and  of  slightly  more  feeble  curvature,  mon^  arcuately 
rounded  at  the  bottom  than  along  the  sides,  from  six  to  seven  times  as  wide 
as  deep. 

Famih. — Sixth  segment  rather  broadly  and  unevenly  rounded  behind. 

Length  2.t)-3.tt  nun. 

Lo3  Angeles,  Culiloniia,  10, 


,.  i     \  I 


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IMAGE  EVALUATION 
TEST  TARGET  (MT-3) 


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1.0 

1^128     12.5 
:     Ui  1^    12.2 

I.I 

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1.25 

1  1.4      1.6 

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<v 


92 


NORTH    AMERICAN 


The  lon;^  pubescence,  higlily  [)olislic(l  surface,  and  remarkably 
coarse  and  irregular  sculpture  of  the  elytra,  will  at  once  distinguish 
this  species. 

71.  S.  olistl'lisus  n.  sp. — Form  rather  shMider.  Pubescence  rather 
short,  sjjarse,  soniewliat  coarse,  Aul)-recuiubeiit,  cinereous.  Head  small 
and  I'obust,  scarcely  twice  as  wide  as  long  ;  interocular  surface  nearly  twice 
as  wiile  as  the  eye,  Hat ;  longitudinal  snlcations  very  feeble  ;  inttM-mediate 
surface  slightly  wider  than  the  lateral  portions,  very  feid)ly  and  (jveiily 
convex,  sunnnit  very  narrowly  inii)un(tate  ;  punctures  coarse,  very  closely 
crowd(Ml  and  somewhat  polygonal  in  outline  ;  ocular  lines  meeting  at  one 
length  in  advance  ;  antennae  much  longer  than  the  width  of  In-ad,  basal 
joint  black,  remainder  rather  pale  piceous-brown,  slender,  club  distinct; 
third  joint  one-fourth  as  long  again  as  the  fourth,  fourth  and  fifth  equal, 
sixth  and  seventh  joints  much  shorter,  equal  in  length,  the  latter  nuich 
more  robust,  clubbed,  eighth  sbvnrter  and  much  more  robust  than  the 
sev(^nth,  slightly  broader  than  long,  sub-triangular,  joints  of  club  nearly 
eijual  in  width,  slightly  increasing  in  length,  ninth  and  tenth  very  slightly 
broader  than  long  ;  nuixillary  palpi  moderate,  first  joint  rather  pale  piceo- 
testaceous,  second  slightly  darker,  piceous-brown,  third  darker,  nearly 
piceous-black.  Prothorax  widest  slightly  before  the  middle,  where  it  is 
five-sixths  as  wide  as  the  head  and  one-sixth  narrower  than  long  ;  sides 
thence  feebly  convergent  posteriorly  and  distinctly  sinuate,  very  slightly 
convergent  anteriorly  and  feebly  sinuate  :  .anterior  angles  rounded  ;  anterior 
margin  longer  than  the  posterior,  equally  arcuate  ;  surface  distinctly  and 
longitudinally  tuberculate  near  the  basal  angles,  broadly  and  very  feebly 
swollen  aliout  the  centre  of  tiie  pronotum,  punctures  moderate  in  size,  vari- 
form-, very  closcdy  crowded,  deep,  smaller,  and  more  crowded  near  the  hase, 
larger  and  more  isolated  near  the  middle;  interspaces  narrow,  v<u'y  convex, 
polished.  Elytra  at  hase  as  wide  as  the  head  ;  sides  rather  feebly  divergent 
posteriorly,  longer  than  the  widtli  at  hase,  rather  strongly  arcuate  ;  togc^ther 
broadly,  somewliat  angularly  and  deeply  emarginate  behind  ;  suture  dis- 
tinctly longer  than  the  pronotum  ;  surface  rather  feebly  impressed  on  the 
suture  toward  th(!  base,  and  also  near  the  humeral  angles,  rather  coarsely 
and  feebly,  closely  and  exceedingly  ii  .'egularly  punctured  and  channeled; 
interspaces  narrow,  very  convex,  and  shining.  Abdominal  segments  decreas- 
ing uniformly  and  exceedingly  gradually  in  wi.ith,  tirst  slightly  narrower 
than  the  contiguous  elytra  ;  surface  rather  sparsely,  finely,  and  evenly  punc- 
tulate  ;  transverse  carinae  4-cuspid,  broadly  arcuate,  cusps  very  small,  equal 
in  length  and  e(juidistant,  acuminate  at  tip,  somewhat  rudimentary.  Legs 
moderate,  slender,  piceous-black  ;  first  joint  of  posterior  tarsi  equal  in  length 
to  the  width  of  the  mentum  iit  base. 

Male. — Fifth  ventral  segment  just  perceptibly  and  roundly  emarginate  in 
the  middle,  contiguous  surface  without  trace  of  impression  or  fiattening ; 
sixth  seguient  broaiUy  sinuate  at  tip,  sinus  broader  and  more  feebly  rounded 
tlian  the  apices,  evenly  rounde<l  throughout,  nearly  six  times  as  wide  as  deep  ; 
seventh  narrow,  transversely  truncate  at  tip,  lati.'ral  setae  weii  developed. 

FeiiKih'. — Unknown.  ,  ,  ■ 

Length  3.1  mm.  ,  ■ 


COLEOPTEKA. 


98 


New  York,  1  ;   Cape  May,  New  Jersey,  1. 

The  type  is  in  ratlier  poor  condition  iuul  laeks  tlie  posterior  tarsi, 
with  exception  of  the  first  joint;  tiiis  I  have  compared  witii  the  organ 
which,  in  my  opinion,  wonhl  best  serve  as  a  stamhird. 

This  specimen  was  received  with  Mr.  Fauvel's  hibel,  as  cinerascens 
Er.,  and,  associated  witli  it  were  numerous  otlier  specimens,  which 
proved  to  be  sti/cficiis  Say.  After  carefully  studying  Erichson's  rather 
short  description  of  eiiwritsceiis,  I  am  forced  to  the  conclusion  that 
the  two  species  are  distinct,  more  especially  from  the  following  state- 
ments which  are  quoted  in  the  words  of  that  author: — 

"Antennae  breviusculae,  articulo  tertio  (piarto  vix  longiore,  nigrae. 
Paljii  nigri.  Elytra  thorace  paulo  longiora,  dorsoantico  medio  levis- 
sime  toroso,  densius  profunde  punctata,  interstitiis  plaiiis." 

The  sinuation  of  the  sides  of  the  prothorax  in  front  of  the  middle 
is  a  character  very  seldom  seen  in  the  genus. 

Ohstrusns  somewhat  resembles  stygiciis  Say. 


72.  S.  avizonac  n.  sp.  (Crotch  MS.). — Form  moderately  robust.  Pu1)ph- 
oenco  ratlier  long,  line,  sonicwliat  close,  sub-vecumbeiit,  very  ]iale  tl.ivo- 
oiiiereous.  Head  robust,  rather  small,  not  twite  as  wide  as  long  ;  interouular 
surface  slightly  more  than  twice  as  wide  as  tlie  eye,  nearly  tlat ;  equally 
trilobed  by  the  longitudinal  sulcations,  ^mIucIi  ai'e  rounded  and  distin(;t ; 
surfaces  evenly,  moderately,  and  equally  convex  ;  punctures  soniewliat 
coarse,  close,  rather  evenly  distributed,  interspaces  narrow,  nearly  fiat, 
highly  j)olislied  ;  ocular  lines  meeting  at  nearly  two  lengths  in  advance: 
antenna(^  ssliglitly  longer  tbau  the  width  of  bead,  slender,  piceous-brown, 
club  distinct ;  third  and  fourth  joints  sub  equal,  (iftb  slightly  shorter,  sixth 
slightly  shorter  than  the  fifth  and  distiiu'tly  longer  than  the  seventh,  joints 
three,  four,  and  live  rather  abruj)tly  enlarged  at  the  distal  extremities,  joints 
of  club  of  nearly  equal  size;  outer  joints  densely  and  coarsely  pubescent; 
maxillary  i)alf)i  very  robust  throughout,  dark  piceous-brown,  basal  joint 
piceo-testaceoUH.  Prothorax  ('venly,  gradually,  and  arcuately  increasing  in 
width  to  a  point  slightly  before  the  uiiddle,  where  it  is  (ive-sixths  as  wide 
as  the  head  and  distinctly  narrowiu-  than  long  ;  sides  thence  very  gradually 
convergent  posteriorly  and  strongly  sinuate  ;  anterior  margin  very  slightly 
shorter  and  much  more  arcuate  than  the  ])osterior  ;  surface  very  feebly 
tuberculate  near  tlm  basal  angles,  transversely  and  feebly  impressed  just 
behind  the  apex  ;  finely,  closely,  rather  irregularly,  and  confusedly  punc- 
tate ;  intersjjaces  very  narrow,  polished.  Elytra  at  base  distinctly  wider 
than  the  head;  sides  rather  feebly  divergent  posteriorly,  distinctly  longer 
than  the  width  at  base,  feebly  arcuate,  more  strongly  so  toward  the  apicos  ; 
together  broadly,  roundly,  and  feebly  emarginate  behind  ;  suture  more  than 
one-third  longer  than  the  pronotum  ;  surface  very  feebly,  rather  coarsely, 
very  closely,  and  extremely  irregularly  punctured  and  channeled;  inter- 
spaces narrow,  very  convex,  higlily  polished.  Abdominal  segments  decreas- 
ing uniformly  and  almost  imperceptibly  in  width,  first  much  narrower  than 


1^ 


'.'V 

'r 

M^         5  it. 


04 


NORTH    AMERICAN 


II 


tilt'  fontignous  elytra  ;  surface  highly  polished,  finely  puiictnlate  ;  punctures 
deeply  impressed,  much  closer  toward  the  borders  ;  interspaces  convex  ; 
transvers(*  carinae  arcuate  heliind,  4-cuspid,  middle  cusps  finely  acicular, 
lateral  shorter  and  hroader,  acuminate.  Legs  rather  short  and  stout, 
piceous-Mack ;  first  joint  of  the  posterior  tarsi  nearly  one-half  longer  than 
the  secon<l,  second  and  third  suh-tMjual. 

Male. — Fifth  ventral  segment  just  perceptibly  emarginate  in  the  middle  at 
aj)ex  ;  sixth  very  broadly  sinuate  at  apex,  sinus  occupying  nearly  tli(>  entire 
extent  of  the  segmental  ai)ex,  more  acutely  rounded  at  the  bottom  than  along 
the  sides,  between  five  Hud  six  times  as  wide  as  deep. 

Fiwdle. — Sixth  segnu'ut  narrow,  broadly  and  evenly  rounded  behind. 

Length  13.4-4.0  nun. 

Arizona,  17;  Columbus,  Tvjxas,  1. 

This  species  may  be  easily  distinguished  from  incnlttis  by  its  much 
mofe  robust  form.  The  elytra  in  the  female  are  relatively  much 
shorter  than  in  the  male,  and  tiu^  pronotum  sometimes  bears  traces 
of  a  long  canaliculation.  The  anterior  margin  of  the  prothorax  in 
the  type  bears  slight  evidences  of  a  small  median  sinuosity. 


73.  S.  integer  n.  sp. — Form  very  moderately  robust.  Pubescence  very 
short,  extremely  sparse,  semi-erect,  setiform,  fine,  and  cinereous.  Head 
moderate,  twice  as  wide  as  long  ;  interocular  surfaci;  feebly  convex,  slightly 
less  than  twice  as  wide  as  the  eye;  equally  trilobud  by  the  very  feeble, 
rounded  sulcations  ;  intermediate  surface  feebly  and  evenly  convex  ;  punc- 
tures very  coarse,  deep,  rounded,  moderately  close,  more  isolated  in  the 
middle;  interspaces  nearly  Hat,  shining  ;  ocular  lin(\s  meeting  at  one  huigtli 
in  advance  ;  eyes  hemispherical ;  first  joint  of  antennae  black,  second  dark 
piceous,  equal  in  length  ;  maxillary  palpi  dark  piceons-brown,  first  joint 
rather  pale  piceo-testaceons.  Prothorax  widest  slightly  behind  the  middle, 
where  it  is  four-fifths  as  wide  as  the  head,  and  distinctly  narrower  than 
long;  sides  thence  moderately  convergent  posteriorly,  and  just  perceptibly 
sinuate;  ant(M'ior  and  posterior  margins  nearly  equal  in  length  and  curva- 
ture: surface  very  feebly  and  minutely  tuberculate  near  the  basal  angles, 
very  broadly  and  feebly  swollen  in  the  region  about  the  middle  of  the  pro- 
notum, punctures  rounded,  deejj,  variable  in  size,  very  close,  and  in  some 
portions  rather  lionfused.  Elytra  at  base  as  wide  as  or  just  perceptibly 
wider  than  the  lieail ;  sides  rather  feebly  divergent  posteriorly,  longer  than 
the  width  at  base,  moderately  arcuate;  together  broadly,  evenly,  and  some- 
what strongly  emarginate  behind;  suture  one-fourth  as  l(Uig  again  as  the 
pronotum;  surface  deeply  impressed  on  the  suture  at  the  base;  rather 
coarsely,  very  closely,  deeply,  and  very  irregularly  i)unctured  and  chan- 
neled. Abdominal  segments  decrt^asing  uniformly  and  very  gradually  in 
width,  first  as  wide  as  the  contiguous  elytra;  surf  .ce  broadly  convex,  rather 
coarsely  and  feebly  punctulate ;  transverse  carina  4-cuspid,  cusps  nearly 
equal  in  length,  moderately  long  and  finely  acuminate,  lateral  often  double, 
or  strongly  and  widely  bifurcate,  at  other  places  broad  and  gradually  becom- 
ing amalgamated  with  the  general  surface  of  the  segment.     Legs  moderate 


t' 

•   4 


!■:     ■ 


lan 


ibly 
ll.'UI 

tht- 

tluT 

an- 
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ther 
arly 
ible, 
jom- 
>rate 


COLEOPTERA.  »•• 

In  length,  rather  slender,  pieeous-black  ;  fii>t  joint  of  the  posterior  tarsi 
short,  scarcely  more  than  one-third  as  long  agaMi  as  the  second,  :nuch  sliorter 
tlian  the  last,  joints  two  to  fonr  uniformly  aiKl  rather  rapidly  decreasing  in 
lenj^th. 

Male. — Unknow  n . 

Fntuile. — Sixtli  ventral  segment  verj  evenly  rounded  behind  throughout. 

Lenj,>!i  3.4  nun. 

Winchester,  ]Massaehiisctls,  1. 

Tlie  type  lacks  tlie  antennae,  witli  exception  of  tlie  basal  joints. 

The  species  is  broader  and  nnicli  more  robust,  and  with  a  much 
narrower  bead  than  those  to  wliicli  it  is  more  closely  allied ;  the 
elytra  are  also  proportionally  longer. 

74.  S.  floridaillis  n.  sp. — Foim  rather  slender.  Pubescence  ratlier 
short,  sparse,  eoarst^,  send-erect,  cineri^ous.  Head  robust,  distinctly  less 
tlian  twice  as  wide  as  long  ;  interooular  surface  nearly  flat,  twice  as  wide  as 
the  eye;  longitudinal  elevation  narrow,  feebly  convex;  punctures  rather 
coarse,  very  close,  deep,  somewhat  irregular  in  outline  ;  ocular  lines  meeting 
at  one  length  in  advance  ;  antennae  slender,  mucli  longer  tlian  the  widtli 
of  head,  piceous-black,  club  slender;  joints  tliree,  four,  and  live  decreasing 
uniformly  and  somewhat  gradually  in  length,  joints  of  club  of  nt-arly  e(iual 
thickness  ;  maxillary  palpi  long,  slender,  jiiceoiis-black,  first  joint  translu- 
cent, much  paler,  and  piceo-testaceous.  Prothorax  'videst  sliglitly  before 
the  middle,  where  it  is  four-fiftlis  as  wide  as  the  head,  and  nearly  one-sixth 
narrow(!r  than  long  ;  anterior  margin  distinctly  longer  than  the  posterior, 
equally  arcuate;  surface  transversely  impressed  just  behind  tlie  anterior 
margin  ;  coarnely,  closely,  deeply,  and  irregularly  punctate ;  punctures 
generally  confusedly  coalescent ;  interspaces  very  narrow,  convex,  and  very 
liighly  polished.  Elytra  at  the  base  as  wiile  as  the  head  ;  sides  very  feebly 
divergent  posteriorly,  much  longer  than  the  width  at  base,  feebly  arcuate; 
together  broadly,  angularly,  and  strongly  emarginate  behind;  suture  about 
one-tenth  as  long  again  as  the  pronotum  ;  surface  strongly  and  narrowly 
impressed  on  the  suture  towar<l  tlie  l)ase  ;  coarsely,  deeply,  very  closely, 
and  extremely  irregularly  punctured  and  channeled,  cliannels  generally 
perpendicular  to  the  sutnre  in  the  impressed  area,  and  convergent  loward 
the  inner  apical  angles  behind  ;  jnmctures  occasionally  isolated  along  the 
borders  of  the  impressed  area.  Abdominal  segments  decreasing  very  uni- 
formly and  gradually  in  width,  first  somewhat  narrower  than  the  contiguous 
elytra  ;  surface  highly  polished,  finely,  and  irregularly,  but  generally  dis- 
tantly punctulate  ;  punctures  very  sparse  along  the  middle;  tiansverse 
carinae  4-cuspid,  cusps  moderate  in  length,  aciculate.  Legs  short  and 
slender,  piceous-black  ;  lirst  joint  of  the  posterior  tarsi  one-half  as  long 
again  as  the  second,  as  long  as  the  second  and  third  together,  slightly 
shorter  than  the  last,  joints  two  to  four  uniformly  and  very  rapiil  decreas- 
ing in  length. 

Mule. — i'osterior  edge  of  the  fifth  ventral  segment  just  perceptibly  and 
roundly  emarginate  in  its  middle  fourth,  contiguous  surface  exhibiting  but 


<!|E .  I  m 


I. 


?  ;'•' 


96 


NORTH    AMKUICAN 


slight  tt'udcnpy  to  flattening  ;  sixtli  sepnient  very  broadly  sinnatw  at  apex, 
sinus  oi'cni)ying  tlit*  cntiro  width  of  the  segment,  fi'i'hly  anil  evenly  rounded 
throughout,  about  twelve  tiries  as  wide  as  deep. 

J'luiiilf. — Unknown. 

Length  2.8  inin. 

('('(Uir  Keys,  Florithi,  1. 

Tin;  secoiul  joint  of  tlic  tarsus  is  luuisually  long. 

7;').  S.  COloilUS  Kri(di». — Form  rather  slender.  Pubescence  sparse,  a 
little  more  dense  at  tlu;  sides  and  toward  the  vertex  of  the  abdomtni.  Head 
robust,  less  than  twice  as  wide  as  long ;  interocular  surface  flat,  distinctly 
less  tlian  twice  as  wide  as  the  eye;  punctures  very  close,  small,  evenly  dis- 
tribiitecl  ;  longitudinal  elevation  a  little  bri)a<ler  than  the  lateral  jiortioiis, 
feebly  and  evenly  convex  ;  ocular  lines  meeting  at  two  lengths  in  advance  ; 
antennae  as  hnig  as  the  width  of  head,  basal  Joint  black,  remaii;d"r  moder- 
ately })ale  piceous-brown,  slender,  club  small  ;  third  Joint  two-lifths  as  long 
again  as  the  fourth,  fourth  and  fifth  sub-equal  in  length,  fifth  but  very 
slightly  shorter  than  the  third,  six  and  sc^ven  ecjual  in  length,  the  latter 
thicker,  eighth  slightly  thicker  than  the  seventh,  distinctly  elongated,  ovu- 
late, joints  of  club  increasing  in  length,  last  two  of  equal  thickness  ;  maxil- 
lary palpi  rather  short,  first  Joint  an<l  base  of  the  second  j)ale  testac^i^ous, 
remainder  dark  j)iceous  brown.  Prothorax  widest  slightly  behind  the  mid- 
dle, where  it  is  five-sixths  as  wide  as  the  head,  and  distinctly  narrower  than 
long  ;  sides  thence  moderately  convergent  posteriorly  and  very  f(!ebly  sinuatt* ; 
anterior  margin  very  slightly  shorter  and  more  arcuate  than  the  posterior  ; 
surface  finely,  very  closel}',  confusedly  punctured;  junx'tures  isolated  in  tin' 
centre,  very  crowded  and  confused  toward  the  base.  Elytra  at  bas(^  about 
as  wide  as  the  head  ;  sides  moderately  divergent  posteriorly,'longer  than  the 
width  at  base,  feeblv  arcuate,  more  strongly  so  behind  ;  together  broadly  and 
feebly  emarginate  Ixdiind  ;  suture  outvsixth  as  long  again  as  the  pronotum  : 
surface  rather  convex,  narrowly  impressed  along  the  suture,  particularly 
towanl  the  bast;  ;  rather  coarsely,  feebly,  and  irregularly  punctate  ;  inter- 
spaces narrow  and  shining;  chamiels  neither  long  nor  well-marked.  Abdo- 
minal segments  decreasing  nniformly  and  moderately  ra{)idly  in  width,  first 
very  slightly  narrower  than  the  contiguous  elytra  ;  surface  rather  convex, 
somewhat  finely  an<l  evenly  i)unctulate  ;  punctures  of  fifth  segment  much 
finer  and  closer  ;  transverse  carinae  4-cuspid,  cusps  ec^ual  in  length,  equi- 
distant, rather  long,  and  finely  aciculate.  Legs  moderate  in  length,  some- 
what slender,  piceous  black  above  and  beneath,  tarsi  paler;  first  Joint  of 
posterior  tarsi  one-half  as  long  again  as  the  second,  much  shorter  than  the 
last,  second  and  third  sub-equal,  fourth  shorter,  fifth  gradually  narrowed 
toward  tlie  basi^ 

Afdie. — Fifth  ventral  segment  not  appreciably  modified  ;  sixtli  very  broad 
at  apex,  broadly  sinuate,  sinus  very  much  wider  and  more  feeble  in  curva- 
ture than  the  apices,  evenly  rounding  throughout,  eigli  or  nine  times  as  wide 
as  deep,  lateral  setae  of  sev(!uth  segment  absent. 

Female. — Sixth  segment  very  broadly  truncate  at  apex,  truncation  feebly 
arcuate  and  just  perceptibly  produced  in  the  middle.  v 

Length  3.0-3.4  mm.  '        . 


COLEOPTEUA. 


97 


Tiiiko  Superior  (locality  not  specifi(!(l),  10;  Capron,  Florida,  5  ; 
Siiiid  Point,  Florida,  2  ;  Mid<lle  States,  1 ;  Southern  States,  2  ;  Cam- 
bridge, Massaclinsetts,  1  ;  Waverly,  ^lassacliusetts,  1  ;  Willets  Point, 
Long  Island,  1  ;  California,  1 ;  Arizona,  1. 

A  very  widely  distributed  species,  and  easily  recognized.  In  some 
specimens  there  is  a  very  feeble  indication  of  a  canaliculation  near 
the  middle  of  the  pronotum. 

The  parasite  of  tiiis  species  is  scarcely  as  long  as  the  third  joint 
of  the  maxillary  palpi,  nearly  circular  in  outline,  rather  strongly 
convex,  pale  reddish-testaceous,  and  extremely  highly  polished;  it  is 
transversely  segmented  at  two-thirds  its  length  posteriorly,  and  at 
the  posterior  tip  bears  four  or  five  short  cinereous  setae. 

7<5.  S.  maniniops  n.  sp. — Form  very  moderati^ly  robust,  sides  parallel. 
Pnhosuenci!  rather  short,  seini-ereut,  line,  moderately  elose,  uinereous.  Head 
large,  twice  as  wide  as  long;  interoeular  surface  twice  as  wide  as  the  eye, 
nearly  Hat ;  longitudinal  elevation  slightly  wider  than  the  lateral  portions, 
evenly  and  rather  strongly  convex  ;  snlcations  scarctdy  visil)l(!;  jiunctures 
variolate,  rather  coarse,  closely  crowded,  nearly  evenly  distributed,  poly- 
gonal in  outline  ;  ocular  lines  meeting  at  less  than  one  length  in  advance  ; 
antennae  slightly  longer  than  the  vidtli  of  head,  slender,  club  moderate, 
basal  joint  black,  remainder  rather  dark  piceous-brown  ;  third,  fourth,  an<l 
fifth  joints  decreasing  unifonnly  and  very  gradually  in  length,  sixth  and 
seventh  sub-equal  in  length,  the  latter  much  the  more  robust,  eighth  as  long 
as  the  nintli,  much  shorter  than  the  seventh,  very  robust,  narrowed  at  base, 
joints  of  club  increasing  in  length,  the  last  two  equal  in  width  and  somewhat 
more  robust  than  the  ninth;  maxillary  palpi  rather  pale  piceous-brown, 
basal  joint  and  first  third  of  the  second  nuitli  paler  llavo-testaceous.  Pro- 
thorax  very  large  and  robust,  arcuately,  evenly,  and  rather  rapidly  widening 
to  a  point  slightly  behind  the  middle,  where  it  is  five-sixths  as  wide  as  the 
head,  and  just  perceptibly  narrower  than  long  ;  sides  thence  rapidly  conver- 
gent and  very  slightly  sinuate  ;  anterior  margin  slightly  shorter  and  much 
more  arcuate  than  the  posterior,  the  latter  nearly  transverse  ;  surface  rather 
strongly  tuberculate  near  each  basal  angle,  tuberculations  very  widely  sepa- 
rated;  also  transversely  and  very  feebly  impressed  just  behind  the  anterior 
margin  ;  finely,  very  closely,  rather  feebly,  and  very  confusedly  punctate. 
Elytra  at  base  much  narrower  than  the  head,  scarcely  wider  than  the  pro- 
thorax  ;  sides  strongly  divergent  posteriorly,  as  long  as  the  width  at  base, 
feebly  and  evenly  arcuate  ;  together  broadly,  somewhat  angularly  and 
rather  deeply  emarginate  behind  ;  suture  distinctly  shorter  than  the  prono- 
tum ;  surface  depressed,  nearly  even,  very  roughly,  evenly,  closely,  finely, 
and  confusedly  punctate.  Abdominal  segments  decreasing  uniformly  iu 
width  and  with  extreme  slowness,  first  slightly  wider  than  the  contiguous 
elytra ;  surface  coarsely,  feebly,  rather  closely,  and  evenly  punctulate ;  be- 
coming much  more  finely  so  toward  the  vertex  ;  transverse  carinae  tricuspid, 
middle  cusp  strong,  finely  acuminate  at  tip,  becoming  much  shorter  on  the 
posterior  segments,  lateral  short,  rudimentary,  and  generally  bifid,  except  on 
Steniki.  7 


'IB 


'■4^1 


m 

m 

m 


98 


NORTH    AMKKICAN 


the  first  segment,  where  they  are  longer,  more  slender,  and  slightly  inclined 
inward.  Legs  short,  dark  fusco-piceoua,  under  surface  of  femora  fnscous 
and  niiu'li  paler  ;  first  joint  of  posterior  tarsi  one-half  as  long  again  as  the 
second,  inucli  shorter  than  the  last,  second  niucii  longer  tiian  the  third,  fourth 
very  small  ;  tarsi  gradually  attenuated  toward  tip. 

Mali;. — Posterior  edge  of  the  iifth  ventral  segment  emarginate  in  its  mid- 
dle third,  emargination  evenly  rounded  and  about  ten  times  as  wide  as  deej), 
contiguous  surface  feehly  inij)ressed,  impression  becoming  gradually  extimit 
anteriorly;  sixth  segment  deeply  sinuate  at  apex,  sinus  and  apices  of  ecjual 
curvature,  the  former  evenly  and  rather  acutely  rounded,  and  about  twice 
as  wide  as  deep  ;  seventh  (svenly  and  rather  strongly  emarginate  at  tip. 

Fi'iimle. — Sixth  segment  broadly  and  very  evenly  rounded  behind. 

Length  2.4-2.9  mm. 

Cambridge,  JMassacliiisett.*,  40 ;  'rrenton  Fulls,  New  York,  4 ; 
Detroit,  Micliigan,  G  ;  Batcliehwanung  Bay,  Lake  Sujjerior,  2  ;  Miclii- 
picoten  River,  Lake  Superior,  4 ;  Marquette,  Micliigan,  4  ;  Isle 
Royale,  Lake  Superior,  1  ;  Fort  Garland,  Colorado,  2  ;  Lake  Quesnel, 
British  Columbia,  9. 

Easily  recognized  by  its  very  short  elytra,  large  protliorax,  and 
very  rough  sculpture.  As  may  be  seen  by  the  tbn'going  list  of 
localities,  it  is  very  widely  distributed,  and  I  can  find  no  perceptible 
variation  of  any  kind,  even  in  specimens  from  the  most  widely  se[)a- 
rated  regions. 


77.  S.  gravidlis  n.  sp. — Form  rather  robust,  sides  parallel.  Pubescence 
very  short,  semi-erect,  ratiier  sparse,  fine,  dark  plumbeO-cinereous.  Head 
large  and  robust,  distinctly  more  than  twice  as  wide  as  long;  interocular 
surface  nearly  Hat,  twice  as  wide  as  the  eye ;  equally  trilobed  by  the  very 
faint,  rounded  sulcations  ;  intermediate  surface  rather  strongly  and  evenly 
convex,  rising  al)f)ve  the  general  surface  ;  punctures  small,  very  close,  poly- 
gonal, confusedly  coalesceut ;  ocular  lines  meeting,  at  less  than  one  length  in 
advance  ;  antennae  distinctly  shorter  than  the  width  of  head,  slender,  club 
moderate,  dark  piceous-brown,  basal  joint  black  ;  third  joint  one-fourth  as 
long  again  as  the  fourth,  fourth  and  tifth  eijual,  sixth  shorter  and  much 
more  slender  than  the  seventh,  eitrhth  equal  in  width  to  the  seventh,  sliglitly 
elongated,  nearly  sub-globular,  joints  of  club  very  gradually  increasing  in 
length,  ninth  oval  and  intermediate  in  thickness  between  the  eighth  and 
tenth,  tenth  and  eleventh  of  equal  width  ;  maxillary  palpi  moderate  in 
length,  piceous-brown,  first  joint  and  base  of  the  s<;co:id  piceo-testaceous. 
Prothorax  robust,  arcuately  and  rather  rapidly  widening  to  a  point  slightly 
in  advance  of  the  middle,  where  it  is  three-fourths  as  wide  as  the  head,  and 
just  perceptibly  narrower  than  long  ;  sides  thence  moderately  convergent 
and  straight ;  anterior  and  posterior  margins  sub-equal  in  length,  the  former 
slightly  the  more  arcuate;  surface  distinctly  tuberculate  near  the  basal 
angles,  tuberculations  widely  separated  ;  also  transversely  and  rather  feebly 
impressed  jujtt  behind  the  anterior  margin  ;  punctures  rather  small,  feebly 


COLEOPTEIIA. 


\)d 


iinju-i'sserl,  cloao,  very  confusedly  coaleacent.  Elytra  at  base  much  narrower 
than  the  head  ;  Hides  strongly  divergent  posteriorly,  longer  than  the  width 
a1  base  and  moderately  arcuate  ;  together  very  broadly,  roundly,  and  rather 
strongly  eniarginate  behind  ;  suture  very  slightly  shorter  than  the  pnuiotunj ; 
surface  depressed,  nearly  even,  rather  linely,  closely,  roughly,  and  ,'ery  con- 
fusedly sculptureil ;  channels  not  distinctly  traceable.  Abdominal  segments 
arcuately  and  just  perceptibly  decreasing  in  wi<lth,  first  slightly  wider  than 
the  contiguous  elytra  ;  surface  broadly  and  feebly  convex  ;  very  coarsely, 
rather  distantly  and  evenly  ]tunctulate  ;  transversi^  carinae  tricuspid,  cu:'ps 
rather  long,  e(iual  in  length,  middle  ones  becoming  linely  acuminate,  lateral 
broad,  decreasing  in  width  toward  tip,  where  they  are  narrowly  truncate  and 
confluent  with  the  general  surface.  Legs  short  and  slender,  dark  blackish- 
fuscous  above,  slightly  paler  beneath  ;  first  joint  of  the  posterior  tarsi  scarcidy 
one-fourth  as  long  again  as  the  second,  very  much  shorter  than  the  fifth, 
second  much  longer  than  the  third,  third  and  fourth  of  nearly  ecjual  length  ; 
the  first  two  joint.-:  are  much  more  robust  than  the  third  and  fourth  ;  tin-  fifth 
is  slightly  clavate. 

Mule. — Fifth  ventral  segment  scarcely  modified,  with  the  excepti(Ui  of  a 
very  faint  flattening  along  its  midillts  fourth  ;  sixth  segment  broadly  and 
feebly  bilobed  at  apex,  cusp  very  feebly  and  narrowly  roundiMl,  arms  nearly 
straight;  seventh  very  feebly  sinuate  at  tip,  without  trace  of  either  terminal 
teeth  or  lateral  setae. 

Female. — Unknown.  * 

Length  3.0  nun. 

Cambridge,  Massachusetts,  1. 

I  am  quite  sure  of  the  sex  of  the  above  type  specimen,  altliough 
the  cliaracters  of  the  sixth  segment  as  given,  are  rather  fliose  of  a 
female  in  types,  the  males  of  which  are  provided  with  very  striking 
sexual  characters.  The  species  is  very  distinct,  and  could  not  fail  of 
instant  recognition  by  the  unaided  eye,  even  when  among  a  large 
number  of  other  species,  witii  sole  exception  of  the  preceding  form, 
to  which  it  bears  an  illusive  resemblance.  They  may  be  distinguished 
by  the  more  robust  form  and  coarser  sculpture  of  gravidus,  and  also 
by  differences  in  the  sexual  characters. 


"  y 


1 


78.  S.  aniniatlis  n.  sp. — Form  rather  slender.  Pubescence  short,  sub- 
recumbent,  rather  close,  fine,  pale  fulvo-cinereous.  Head  robust,  scarcely 
twice  as  wide  as  long;  interocular  surface  feebly  depressed,  slightly  more 
than  twice  as  wide  as  the  eye  ;  longitudinal  elevation  narrower  than  the 
lateral  portions,  evenly  and  very  strongly  convex,  conspicuous ;  punctures 
rather  fine,  closely  crowded,  and  oblong  near  the  eyes,  more  sparse  along 
the  median  line  ;  ocular  lines  meeting  at  two-thirds  of  a  length  in  a<lvance  ; 
ai'tennae  as  long  as  the  width  of  head,  slender,  club  small,  basal  joint  black, 
second  slightly  paler,  remainder  pale  piceous-brown  ;  third  joint  one-half  as 
long  again  as  the  fourth,  fourth  and  fifth  equal  in  length,  sixth  and  seventh 
very  slightly  shorter,  equal  in  length,  the  latter  thicker  and  oval,  eighth 


111 


100 


NORTH    AMERICAN 


\ 


I- 


1  f^ 


>f  p 


scarcely  more  tlian  one-half  as  long  as  the  seventh  and  soniow  hat  leas  robust, 
oval,  joints  of  club  increasing  nnifornily  and  very  gradually  in  length  and 
thickness  ;  maxillary  palpi  piceoiis-Mack,  slender,  first  joint  translucent  and 
dark  piceo-testaceous.  Prothorax  widest  at  the  middle,  where  it  is  five-sixths 
as  wide  as  tin-  head  and  distinctly-narrower  than  long-  sides  inence  feebly 
convergent  jxisteriorly  and  very  feebly  sinuate  ;  anterior  margin  very  slightly 
shorter  and  distinctly  more  arcuate  than  the  posterior  ;  surface  obliquely 
tuberculate  at  the  basal  angles,  fetdily  and  transverscdy  iiripressed  just  be- 
hind the  anterior  margin  ;  punctures  sn\all,  feeble,  eonfuseiUy  coalescent  near 
the  margins,  more  isolated  in  the  middle,  where  the  interspaces  are  nearly 
flat  and  minut(dy  reticulated.  Elytra  at  base  as  wide  as  the  head;  sides 
moderately  divergent  posteriorly,  longer  than  the  width  at  base,  nearly 
straight,  slightly  sinuous  ;  together  broadly,  angularly,  and  somewhat 
strongly  emnrginate  behind  ;  suture  one-eighth  as  long  again  as  the  pro- 
notum ;  surface  imj)ressed  along  the  sutur:;  toward  the  base;  punctures 
small,  rounded,  feebly  impressed,  rather  close,  and  confusedly  coalescent. 
Abdominal  segments  decreasing  uniformly  and  very  gradually  in  width,  first 
as  wide  as  the  contiguous  elytra  ;  surface  coarsely  and  somewhat  closely 
punctulate,  soinewhat  more  finely  so  j)osteriorly,  and  sparsely  so  along  the 
median  line;  transverse  carinae  tricuspid,  middle  cusps  strong,  finely  acumi- 
nate at  tip,  lateral  distant  and  so  rudimentary  as  to  appear  simply  as  broad 
and  very  feeble  protuberances.  Legs  short  and  sleiider,  piceous-black  above, 
•lark  piceo-fuscous  beneath  ;  first  joint  of  the  poster'.oi-  tarsi  three-fourths  as 
long  again  as  the  second,  longer  than  the  last,  second  joint  as  long  as  the 
third  and  fourth  together,  fourth  very  small,  oblique. 

Mule. — Unknown. 

Female. — Sixth  ventral  segment  broadly  and  evenly  rounded  behind. 

Length  2. (J  mm. 

Marquette,  Lake  Superior,  1. 

This  species  belonfi;s  to  an  extremely  common  type  of  tlie  genus, 
and  has  numerous  affinities  with  various  species  in  tlie  group  with 
caualicuhited  pronotum  ;  it  appears,  liowever,  to  be  distinct,  as  far  as 
tlie  very  limited  material  at  hand  will  allow  of  judgment. 

79.  S.  tlimicollis  n.  sp. — Form  moderately  slender,  sides  parallel. 
Pubescence  rather  short  and  sparse,  sub-recumbent,  fine,  pale  flavo-cinere- 
ous.  Head  moderate,  robust,  scarcely  twice  as  wide  as  long ;  interocular 
surface  tiat,  more  than  twice  as  wide  as  the  eye,  equally  trilobed  by  the  very 
feeble,  rounded  sulcations  ;  intermediate  surface  feebly  and  evenly  convex  ; 
punctures  rather  coarse  near  lli«  eyes,  much  finer  along  the  middle,  very 
close,  rounded  in  outline,  not  coalescent ;  ocular  lines  meeting  at  nearly  one 
and  one-half  lengths  in  advance  ;  antennae  equal  in  length  to  the  width  of 
head,  very  robust,  piceous-black,  club  distinct ;  first  two  joints  equal  in 
length  and  thickness,  third  joint  one-third  as  long  again  as  the  fourth, 
fourth  and  fifth  equal,  sixth  distinctly  longer  and  more  slender  than  the 
seventh,  eighth  small,  sub-globular,  joints  of  club  increasing  rapidly  in 
length,  last  two  of  equal  thickness  ;   maxillary  palpi  long,  piceous-black, 


C'OLEOPTKUA. 


101 


first  joint  translucent  and  pal«  pieeo-testaoeous,  tliinl  robust,  noarly  as  long 
an  tlii>  first  and  sroond  toj^t^tlu^r.  Prothorax  widi'st  sli},'lit!y  in  advance  dl'  thu 
miildlt;,  where  it  is  five-sixtlis  as  widt;  as  tlni  lu-ad,  and  distinctly  narrower 
than  long ;  sides  thence  rather  rapidly  convergent  posteriorly  and  distinctly 
sinuate  ;  anterior  niar),'in  slij^litly  li>nj;er  tiinn  the  i)osteri()r,  ecuially  arcuate  ; 
(surface  broadly  llatteiied  above,  feelily  tuberculate  near  tlie  liasal  angles, 
and  broadly  swollen  throughout  the  length  and  breadth  of  the  anterior  half 
of  the  ])ronotnni  ;  punctures  rather  sniall,  somewhat  variform,  generally 
Kiunded  and  very  clos<',  interspace's  feidily  convex,  distinctly  granulate  and 
feebly  shining.  Elytra  at  base  just  i»erceptibly  narrower  than  the  heail : 
sides  moderately  divergent  posteriorly,  slightly  longer  than  the  wiiltli  at 
base,  nearly  straight ;  together  broadly,  roundly,  and  rather  strongly  eiiiar- 
ginate  behind;  suture  one-seventh  as  long  again  as  the  pronotnni ;  surface 
feebly  impressed  on  the  suture  toward  thi!  base,  coarsely  and  rather  closely 
punctured  ;  i>unctures  seldom  coalescing,  round,  very  variable  in  size  and 
distance,  being  sniall  and  widely  isolated  near  the  inner  basal  an),'les,  anrl 
very  large  and  closely  crowded  behind  the  uiidtlle.  First  three  abdominal 
Segments  sub-equal  in  widtli,  and  as  wide  as  the  contiguous  elytra  ;  surface 
coarsely  and  clostdy  punctnlate,  much  more  lluely  so  toward  the  tip  ;  trans- 
verse carinae  ..licuspid,  cusps  rather  long,  linely  acuminate,  and  distant, 
lateral  slightly  shorter  and  incline<l  inward.  Legs  moderate,  piceous-black 
above,  femora  dark  jiiceo-rufous  beneath ;  first  joint  of  the  posterior  tarsi 
two-thirds  as  long  again  as  the  second,  much  shorter  than  the  last,  joints 
two  to  four  decreasing  uniformly  and  very  gradually  in  length. 

Malp. — Unknown. 

Female. — Sixth  ventral  segment  very  evenly  rounded  behind  throughout. 

Lt^ngtb  2.7  mm. 

Detroit,  Michigan,  1. 

Tliis  species  is  cusily  recognized  by  the  broadly  rectangular,  tliough 
nither  moderate  and  superficially  flattened  swelling,  which  occupies 
the  entire  anterior  half  of  the  pronotum. 

80.  S.  cariniCOllis  n.  sp. — Form  moderately  slender,  sides  parallel. 
Pubescence  rather  short,  coarse,  close,  sub-recumbent,  dark  fulvo-cinereous. 
Head  moderate,  twice  as  wide  as  long ;  interocular  surface  nearly  flat,  two 
and  one-half  times  as  wide  as  the  eye  ;  longitudinal  sulcations  very  deep  and 
conspicuous ;  intermediate  surface  narrower  than  the  lateral  portions,  strongly 
and  evenly  convex  ;  punctures  rounded,  fine,  very  closely  crowded,  some- 
what confused ;  ocular  lines  meeting  at  somewhat  more  than  one  length  in 
advance  ;  antennae  very  slightly  longer  than  the  width  of  bead,  moderately 
Blender,  piceous-black,  club  distinct ;  third  joint  one-fourtli  as  long  again 
as  the  fourth,  fourth  just  perceptibly  longer  than  the  fifth,  seventh  much 
shorter  than  the  sixth  and  slightly  longer,  though  scarcely  more  slender 
than  the  eighth,  eighth  slightly  shorter  than  the  seventh  and  no  thicker, 
sub-cylindrical,  joints  of  club  increasing  rather  rapidly  in  length.  Prothorax 
arcuately,  evenly,  and  rapidly  increasing  in  width  to  the  middle,  where  it  is 
three-fourths  as  wide  as  the  head,  and  distinctly  narrower  than  long  ;  sides 


m 

m 


102 


NORTH    AMKHICAN 


thtjiice  rnoderatHly  convergent  posteriorly  hikI  strongly  sinnate  ;  antorlor 
mari^in  sli^;litly  shorter  than  the  hase,  very  areuate,  posterior  margin  trans- 
verse ami  straight  ;  surface  finely,  closely,  rather  feel)ly,  anil  confuseill_> 
punotato,  very  foolily  nhining  ;  feehly  and  minutely  tnliercutatH  near  tho 
basal  angles  ;  transversely  swolli<4i  near  the  middle,  from  which  jioint, 
extending  posteriorly  nearly  to  the  hase,  there  is  a  narrow,  fine,  acute,  and 
promiTient  carina.  Elytra  at  the  hase  very  slightly  narrower  than  the  head; 
sides  very  feebly  divergent  posteriorly,  eijual  in  length  to  the  width  at  base, 
nearly  straight ;  together  hroadly,  somewhat  angularly  anil  deeply  emargi- 
nate  hehind;  suture  equal  in  length  tiv  the  jtronotum;  surface  rather  de- 
pressiMl,  feehly  impressed  along  the  suture,  more  strongly  so  toward  tho  hast), 
also  longitudinally  inij)ressed  nt>ar  the  hunn^'i ;  closely,  rather  coarsely,  very 
feehly,  and  irregularly  i)Unctured  and  channeled.  First  three  ahdominnl 
Begments  equal  in  width,  and  as  wide  as  the  contiguouH  elytra;  surface 
coarsely,  exceedingly  closely,  and  feebly  punctulate  ;  transverse  carinae  not 
cusped.  Legs  moderate,  ])iceous-hlack,  femora  dark  j)iceo-rufous  ;  first  joint 
of  the  posterior  tarsi  two-thirds  as  long  again  as  the  second,  second  as  long 
aa  tho  third  and  fourth  together. 

Mule. — Fifth  ventral  segment  emarginate  in  its  middle  third  at  apex, 
emargination  (evenly  rounded,  feeble  and  almost  nnmeasurable,  angles 
rounded,  contiguous  surface  feehly  impressed  throughout  anteriorly,  sides 
of  impressed  area  slightly  convergent ;  sixth  segment  sinuate  at  apex,  sinus 
and  apices  nearly  equal  in  width  and  curvature,  five  times  as  wide  as  deep  ; 
seviMitli  feebly  and  roundly  emarginate  at  tip,  surface  minutely  granulosa 
ami  lusti'eless. 

Fciniilc. — Sixth  segment  angularly  produced  at  the  apex. 

Length  2.3-2.8  mm. 

IVIivniuette,  IMichigaii,  4  ;  Gargantua,  Micliigan,  1  ;  Mioliipicoten 
River,  Luke  Siiju'rior,  1. 

One  of  tlie  most  distinct  species  of  the  genus,  and  the  only  one 
known  to  me,  Imving  a  carinated  pronotiim.  All  the  chai'acters 
are  good.  The  palpi  ai'e  veiy  slender,  piceoiis-bhick,  witli  exception 
of  tlie  fifst  joint  and  the  base  of  the  second,  which  are  paler  and 
piceo-testaceous  ;  the  third  joint  is  very  long. 

The  above  description  was  taken  from  tiie  female,  except  that  of 
the  antennae,  which  is  drawn  from  a  male  specimen. 

81.  S.  insignis  n.  sp. — Form  moderately  robust.  Pubescence  rather 
long,  sparse,  recuml)ent,  and  cinereous.  Head  rather  large,  twice  as  wide 
as  long  ;  interooular  surface  nearly  flat ;  sulcations  rounded  and  conspicuous  ; 
intermediate  surface  very  slightly  wider  than  the  Lateral  portions,  evenly 
alid  rather  strongly  convex  ;  punctures  small,  very  sparse,  feebly  impressed, 
and  not  distinct,  interspaces  highly  polished  ;  ocular  lines  meeting  at  scarcely 
one-half  a  length  in  advance ;  antennae  slightly  longer  than  the  width  of 
head,  basal  joint  black,  second  a  little  paler,  the  remainder  pale  piceous- 
brown,  rather  robust,  club  distinct ;  third  joint  one-fourth  as  long  again  as 
the  fourth,  fourth  and  fifth  equal,  sixth  and  seventh  equal  in  length,  the 


COLKOPTERA. 


103 


latter  very  gliglitly  tlie  tliiiikcr,  ninlitli  distinctly  elongatod,  oval,  joints  of 
cliilt  incrnasiiig  nliglify  in  Icnglli,  tlu'  last  two  of  m-arly  cinial  tliickiicsH  ; 
inaxillai'v  |)iil|ii  ratir  'i'  long  ami  mliust,  ])irc(iiiH-l)la('k,  first  joint  ]ii('f(i-tfsta- 
ceouH.  Prothorax  .ircuatoly,  evenly,  and  giailually  widening  to  the  middle, 
where  It  is  fo.ir-llfllis  as  wide  as  the  head  and  one-sixth  narrower  than  long  ; 
sifles  them'.)  very  niodiTately  convergent  and  feehly  sinnate  ;  anterior  and 
posterior  Margins  ecpial  in  length,  the  former  the  more  arcuate  ;  snrfaee  very 
feehly  airl  minutely  tuheroulate  at  tins  hasal  angles,  otherwise  very  evtnily 
C'  vex,  rather  llnely,  very  sparsely,  nnevenly,  and  feehly  (lunctate;  punc- 
tures i.npressed  and  varying  greatly  in  size  ;  interspaces  tlat,  ohscurely  ami 
minutely  retiuulateil,  highly  polished.  Elytra,  at  base  very  slightly  narrower 
than  the  iiead  ;  sides  moderately  divtM'gent  pcsteriorly,  distinctly  longer  than 
the  width  at  base,  moderately  arcuate  ;  together  hroaiUy  and  very  fi'ehly 
emarginate  hehin<l  ;  suture  nearly  one-sixth  as  long  again  as  t\n;  pronotiim  ; 
Hurface  feehly  inipre8He<l  along  the  suture,  almost  equally  so  throughout ; 
rather  feehly,  somewhat  distantly,  and  very  irregularly  punctured  and  chan- 
neled, interspaces  nearly  tlat,  highly  polished.  Abdominal  segments  decreas- 
ing almost  uniformly  and  rather  rajiidly  in  width,  .Irst  nearly  as  wide  as  the 
contiguous  elytra;  surface  liighly  ]iolished,  rather  strongly  convex,  feehly, 
minutely,  and  very  sparsely  j)unctulate;  transverse  carinat*  apparently  not 
cusped.  Legs  moderate,  piceous-hlack,  tarsi  paler;  first  joint  of  jxisterior 
tarsi  two-thirds  as  long  again  as  the  second,  second  slightly  longer  than  the 
third. 

Male. — Posterior  edge  of  the  fifth  ventral  segment  just  pt>rc.eptihly  emargi- 
nate in  its  middle  third,  emargination  evenly  rounded  and  scarcely  measur- 
able ;  sixth  very  broadly  sinuatti  at  apex,  sinus  occupying  nearly  the  entire 
segmental  apex,  evenly  rounded  throughout,  about  twelve  times  as  wide  as 
deej). 

Female. — Sixth  ventral  segment  evenly  rounded  behind. 

Length  2.9  mm. 

Oiik  Grove,  California,  1  :  Los  Angeles,  California,  4. 
The  very  S|)arse  and  peculiar  punctuation  of  the  head  and  prothorax 
8ej)arates  this  species  from  several  closely  allied  forms. 

Suhdivision  >. 

The  sjtecies  of  thi.s  subdivision  are  nearly  always  easily  recogni- 
zable ;  they  are  generally  small,  highly  polished,  except  in  the  first 
group,  and  more  or  less  pubescent. 

There  are  two  groups  indicatf^d  : — 

Punctures  rather  deep,  closely  crowded,  hut  usually  not  coalescent ;  inter- 
spaces not  shining  or  very  feebly  so  ;  pubescence  very  coarse,  more  or  less 
fulvous,  abundant I. 

Punctures  more  or  less  deeply  impressed,  rather  more  distant ;  interspaces 
highly  polished ;  pubescence  usually  fine  and  somewhat  dens",  though 
sometimes  very  sparse,  varying  in  color  from  cinereous  to  piceous,  very 
seldom  ilavate II. 


I 


l"l 


"FW^ 


■ft 


104 


NOUTII    AMERICAN 


Subdivision  >. 
Group  I. 

Tliis  group  contiiius  but  two  specln,  both  very  abiindiint,  well 
kfiowii,  and  of  very  distinct  appearance.  They  are  nearly  opaque, 
and  have  n  roughly  tiiougli  evenly  Ludptured  surface.  The  robust, 
fulvous  setae  are  very  cons|)iciious.  .S'.  eorvits  might  be  placed  here, 
but  it  lacks  the  fulvous  pubescence  to  a  great  extent. 

Our  two  species  may  be  recognized  by  the  following  characters : — 

Longitudinal  sulc.ations  of  liead  distinct ;  form  slender 82.  stygicilS. 

Sulcatioiis  of  head  obsolete  ;    nterocular  surface  flat ;  form  more  rnlmst. 

S3,  egeiius. 


82.  S>  stygiciis  F^ay. — Form  rather  slend(;r.  Pubescence  short,  very- 
coarse,  abundant,  semi-erect,  and  setiforni,  pale  llavo-cinereous.  Head 
UKxbirate  or  small,  scarcely  twict^  as  wide  as  long  ;  interocular  surface 
scarcely  more  than  twice  as  wide  as  the  e^'e,  nearly  flat,  very  densely  punc- 
tured ;  jiunctures  shallow  and  sub-variolate,  interspaces  very  narrow  ;  ocMilar 
lines  meeting  at  one  lengtli  in  advance;  longitudinal  sulcations  distinct; 
antennae  somewhat  longer  than  the  width  of  head,  dark  fusco-piceous,  base 
bhick,  club  small  but  abrupt;  third  joint  just  perceptibly  longer  than  tlie 
fourth,  sixth  very  slightly  longer  than  the  soventli,  eighth  sub-globular, 
very  small,  joints  of  club  nearly  equal  in  size,  tentli  slightly  tlie  thickest  ; 
maxillary  palpi  dark  fusco-piceous,  lirst  joint  fusco-testaceous.  Prothorax 
widest  notably  before  tlie  middle,  where  it  is  five-sixths  as  wide  as  the  liead, 
and  one-fifth  narrower  than  long  ;  sides  thence  feebly  convergent  posteriorly 
and  almost  straight ;  sides  anteriorly  evenly  arcuate  ;  posterior  margin 
slightly  longiu'  and  less  arcuate  than  the  anterior ;  surface  evenly  convex, 
rather  coarsely,  very  closely,  somewhat  evenly,  and  variolately  punctured, 
interspaces  very  narrow,  minutely  granulated,  and  feebly  shining.  Elytra 
at  base  very  slightly  wider  than  thti  liead  ;  sides  nearly  parallel  and  strongly 
arcuate,  much  longer  than  the  width  at  base  ;  together  broadly,  very  evenly, 
and  rather  feebly  emarginate  posteriorly ;  suture  one-fifth  as  long  again  as 
the  jironotum  ;  surface  evenly  convex,  coarsely,  very  closely,  and  evenly 
punctate ;  punctures  wide,  shallow,  variolate,  interspaces  about  one-fourth 
their  width,  feebly  sliining.  Abdominal  segments  decreasing  very  gradually 
in  width,  first  slightly  narrower  tlian  the  contiguous  elytra;  surface  convex, 
shining,  rather  finely,  and  somewhat  distantly  punctulate  ;  punctures  im- 
pressed ;  transverse  carinae  4-cuspid,  cusps  very  short  but  distinct,  intervals 
feebly  sinuate.  Under  surface  of  abdomen  shining  ;  pubescence  long,  fine, 
and  recumbent ;  rather  coarsely  and  distantly  punctulate.  Legs  moderate, 
dark  piceous,  tarsi  paler ;  first  joint  of  the  posterior  one-half  as  long  again 
as  the  Second,  second  notably  longer  than  the  third. 

Mole. — Posterior  edge  of  the  fifth  ventral  segment  just  perceptibly  emargi- 
nate throughout  its  width ;  sixth  broadly  sinuate  at  the  apex,  sinus  sonie- 
wliat  strong,  evenly  rounded,  about  six  times  as  wide  as  deep. 


COLEOPTERA. 


105 


Female, — Sixth   aegmont  very  broadly  and  triangularly  produced  poste- 
riorly, soinetiines  nearly  evenly  rounding. 
Length  3.0-3.7  nun. 

Michi|ticoten  River,  Lake  Superior,  7  ;  Batclieliwaiuing  Bay,  Lake 
Superior,  1  ;  Lake  Superior,  7  ;  Columbus,  Texas,  8  ;  Topeka,  Kan- 
sas, 1  ;  Western  States,  2  ;  Selma,  Alabama,  3  ;  Southern  States,  1  ; 
Middle  States,  4 ;  INIarquette,  Michigan,  1  ;  New  Jersey,  2  ;  District 
of  Columbia,  2  ;  Pennsylvania,  2  ;  Long  Island,  New  York,  4;  New 
York,  3;  Cambridge,  Massachusetts,  ]  ;  Unknown,  13. 

This  common  and  well-marked  species  seems  to  vary  to  a  consider- 
able extent ;  the  head  is  narrower  between  the  eyes,  the  third  joint 
of  the  antennae  is  much  longer  than  the  fourth,  and  the  jialpi  are 
entirely  black  in  tiie  Texas  specimens,  and  the  elytra  are  seemingly 
shorter  in  those  from  Michigan  ;  there  also  appears  to  be  a  slight 
variation  in  the  relative  lengths  of  the  second  and  third  joints  of  the 
posterior  tarsi.  The  punctuation  docs  not  appreciably  vary.  There 
may  be  two  or  more  distinct  species  indicated  by  these  characters, 
but  they  are  so  cl"se,  and  seem  to  have  so  many  intermediate  forms, 
that  I  do  not  feel  warranted  in  describing  them.  It  may  be  readily 
recognized  by  the  unusually  long  second  joint  of  the  posterior  tarsi. 

I  beWeve  this  species  has  been  identified  as  chierascens  Kr.,  by 
Mr.  Fauvel,  but,  on  reading  the  description  of  that  species,  and  com- 
paring it  carefully  with  that  of  stygicus  Say,  as  just  given,  I  am 
unwilling  at  present  to  make  the  change. 

83.  S.  egeniis  Eriohs. — Form  rather  robust.  Pubescence  exceedingly 
sparse,  short,  coarse,  semi-erect,  flavo-cinereons.  Head  niorhfrate,  twice  as 
wide  as  long ;  interocular  surface  flat,  three  times  as  wide  as  the  eye  ;  deeply, 
rather  finely,  and  exceedingly  closely  punctured  ;  no  trace  of  sulcations  or 
elevation  ;  ocular  lines  meeting  at  about  two  and  one-liaU"  lengths  in  advance ; 
antennae  rather  slender,  as  long  as  the  widtli  of  head,  piceous-black,  paler 
toward  tip,  club  small,  but  distinct ;  third  joint  one-third  as  long  again  as 
the  fourth,  joints  three  to  six  uniformly  decreasing  in  length,  six  and  si>ven 
sub-equal,  joints  of  club  successively  increasing  in  length,  eleventh  acumi- 
nate at  lip;  maxillary  palpi  piceous-black.  Prothorax  robust,  widest  just 
before  the  middle,  where  it  is  five-sixtha  as  wide  as  the  head  and  but  slightly 
narrower  than  long;  sides  thence  feebly  convergent  posteriorly,  and  just 
perceptibly  sinuate  ;  anterior  margin  very  slightly  longer  than  the  posterior, 
equally  arcuate  ;  surface  evenly  convex  with  a  very  slight  transverse  impres- 
sion just  behind  the  anterior  margin-;  rather  finely,  evenly,  and  exceedingly 
closely  punctured,  interspaces  just  visible  as  acute  ridges,  lustreless.  Elytra 
at  base  slightly  wider  than  the  head  ;  sides  slightly  divergent  posteriorly, 
feebly  and  evenly  arcuate  ;  together  broadly  and  very  feebly  emarginate 
behind ;   suture  one-fifth  as  long  again  as  the  pronotum ;   surface  convex, 


!^'«l 


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It  I 


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s 


w 


10(5 


NORTH    AMERICAN 


together  with  a  slight  depression  at  the  middle  of  the  base,  very  deeply, 
evenly,  rather  coarsely,  and  exceedingly  closely  punctured  ;  j)unctures  deep, 
polygonal  in  outline  ;  inttirspaces  very  narrow,  minutely  granulate,  without 
lustre.  Abdominal  segments  decreasing  regularly  and  (juite  rapidly  in 
width,  llrst  nearly  as  wide  as  the  contiguous  elytra;  border  proniin(!nt ; 
surface  finely  punctulate,  minutely  but  very  distantly  granulate,  not  shin- 
ing ;  transverse  carinae  4-cuspid,  cusps  broad,  short,  wider  at  the  apices. 
Under  surface  of  the  abdomen  piceous-black,  paler  toward  the  tip,  more 
lustrous  than  the  upper  surface  and  more  finely  punctulate.  Legs  moderate, 
piceous-black  ;  first  joint  of  the  posterior  tarsi  one-half  as  long  again  as  the 
second,  second  but  slightly  longer  than  the  third. 

Male. — Posterior  edge  of  the  fifth  ventral  segment  sinuate ;  sinus  vijry 
narrow  and  feeble ;  sixth  broadly  sinuate  at  apex,  sinus  evenly  rounded, 
five  times  as  wide  as  deep. 

Female. — Sixth  segment  very  broadly  and  evenly  rounded  behind. 

Length  2.8-3.1  mm. 

Michigan  (Escanaba,  Marquette,  Grand  Ledge,  Monroe),  51 ; 
Topeka,  Kansas,  1  ;  Pennsylvania,  2. 

One  of  the  most  distinct  species  in  the  genus  by  reason  of  its  sculp- 
ture.    The  surface  under  a  hand-lens  seems  absolutely  without  lustre. 


Subdivision  >. 
Group  II. 

The  characters  of  the  present  group  have  been  sufficiently  stated 
above ;  the  following  diagnostic  table  will,  perhaps,  distinguish  the 
species  nior'*  ar  less  satisfactorily  : — 

Transverse  carinae  of  abdomen  4-cuspid. 
Prothorax  canaliculated. 

Longitudinal  elevation  of  interocular  surface  distinct. 
Prothorax  widest  distinctly  before  the  middle,  somewhat  cordate. 
Small  si)ecies,  2.7-3.0  mm. ;  pubescence  rather  long  and  conspicuous. 
Somewhat  slender  ;  ocular  lines  close  and  very  convergent.    Colo- 
rado  84.  dolosiis. 

More  robust ;  ocular  lines  distant  and  almost  parallel.    California. 

85.  villosiis. 
Larger  species,  3.8—4.0  mm. 
Pubescence  almost  completely  absent ;    elytral  punctures  small, 
evenly  distributed,  and  widely  isolated.     District  of  Columbia. 

8(3.  sectilifer. 

Pubescence  rather  long  and  conspicuous  ;  elytral  punctures  large, 

deep,  rounded,  and  often  semi-coalescont... 87.  Illilleporiis* 

Prothorax  widest  at  the  middle.     British  Columbia. ...88.  jesiliilis. 

Interocular  surface  nearly  Hat;   sulcations  and  longitudinal  elevation 

obsolete. 


COLEOITERA.  107 

Prothovax  much  elongated  ;  punctures  separated  hy  at  least  their  own 
diameters  ;  pubescence  very  sparse  and  inconspicuous. 

89.  viniiillus. 
Prothorax  very  robust ;  punctures  very  close,  never  separated  by  mure 

than  one-third  of  their  own  width. 
Third  joint  of  antennae  much  sliorter  than  the  fourth.     Alaska. 

90.  congener. 
Third  joint  of  antennae  much  longer  than  the  fourth.     Massaelui- 

setts,  Michigan 91.  canaliculatus. 

Prothorax  not  caualiculated. 

Legs  pale  ;    body  densely  clothed  with  very  long,  erect,  bristling  setae, 

which  are  very  prominent 92.  c'ai'Oliliae« 

Legs  black  or  nearly  so;  pubescence  short,  sub-recumbent,  moderately 
prominent. 
First  joint  of  posterior  tarsi  twice  as  long  as  the  second. ..93.  ageilS* 
First  joint  distinctly  less  than  twice  as  long  as  the  second. 

Joints  three  to  five  of  antennae  uniformly  decreasing  in  length. 

94.  pudicus. 
•  Ant-innal  joints  four  and  five  equal  in  length,  abruptly  shorter  than 
the  third. 
First  joint  of  posterior  tarsi  very  short,  scarcely  one-half  longer 

than  the  second df>.  minor* 

First  joint  much  more  than  one-half  longer  than  the  second. 
Form  somewhat  slender  ;  head  rather  large.     Massachusetts. 

9().  rigitlUS. 

Form  more  robust ;  head  small.     Nebraska 97.  incertus. 

Transverse  carinae  of  abdomen    tricuspid ;    lateral  cusps  very  small    and 

rudimentary 98.  parallell'S. 

Transverse  carinae  not  cusped. 

Prothorax  very  feebly  caualiculated  ;  body  depressed,  elongated  ;  species 

rather  large.    White  Mountains,  N.  H 99.  noCtivagllS. 

Prothorax  not  caualiculated. 

First  joint  of  posterior  tarsi  very  slightly  longer  than  the  second  ;  punc- 
tuation extremely  fine.     California 100.  lUCUlenttlS. 

First  joint  of  posterior  tarsi  from  one-half  to  three-fourths  longer  than 
the  second. 
Very  small  species,  not  exceeding  2.2  mm.  in  length. 

Elytra  much  longer  than  wide,  distinctly  narrowed  toward  the  base, 

distantly  punctured,  very  highly  polished 101.  jUTencUS. 

Elytra  nearly  quadrate,  very  densely  punctured. 

102.  panperculus. 

Larger  species,  not  less  than  2.8  mm.  in  length. 

Antennal  joints  three  to  six  u.iformly  decreasing  in  length;  form 

of  body  sub-cylindrical 103.  liaplus. 

Antennal  joints  three  and  four  ecjual  in  length  ;    suture  of  elytra 

but  slightly  longer  than  the  pronotum  104.  enOflis. 

Antennal  joints  four  and  five  equal  in  length  and  distinctly  Shorter 
than  the  third. 


Ii 


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I 


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nfi 


n 


108 


NORTH    AMERICAN 


'1: 


Piotliorax   distinctly  elongated,  widest   at  one-third    itd   length 
from  tlie  apcx  ;  abdominal  segments  very  rapidly  dei'reasing  in 

width lOr).  dives. 

Prothorax    very   robust,  just   perceptibly   narrower    tlian    long, 
widest  very  near  the   middle  ;    abdom'nal   segments   broad, 
decreasing  very  slowly  in  width. 
First  joint  of  posterior  tarsi  one-half  longer  than  the  second  ; 

body  coarsely  punctured 10(J.  silbgriseilS* 

First  joint  two-thirds  longer  than  the  second  ;  body  much  more 

finely  and  closely  punctured 107.  terricola. 

First  joint  of  posterior  tarsi  twice  as  long  as  the  second. 

Large   species   3.7—4.1    mm. ;    body  excessively   minutely   punctate ; 
pubescence  long  and  recumbent.     Wasliington  Territory. 

1U8.  inunduliis. 

Small  species  not  exceeding  2.9  mm.  in  length. 

Prothorax  widest  before  the  middle  ;  pronotum  remarkably  tuber- 

culate.     Florida 109.  tubercillatll8. 

Prothorax  widest  at  the  middle ;   surface  of  pronotum  very  even. 
Antennal  joints  four  and  five  equal  in  length,  one-third  shorter 

than  the  tliird 110.  indistiiictlis. 

Antennal  joints  three,  four,  and  five  uniformly  and  very  rapidly 

decreasing  in   length  ;    body  vt-ry  densely   and   conspicuotisly 

hirsute 111.  briiiiialis. 


84.  S.  dolosus  n.  sp. — Form  rather  slender.  Pubescence  long,  fine, 
rather  dense,  sub-recumbent,  pale  flavo-cinereous.  Head  small,  twice  as 
wide  as  long  ;  interocular  surface  equally  trilobed  by  the  very  distinct  sulca- 
tions  ;  intermediate  and  lateral  surfaces  nearly  equally,  rather  strongly,  and 
evenly  convex  ;  punctures  rather  coarse  iind  very  close,  nearly  even  ;  ocular 
lines  meeting  at  about  four  lengths  in  advance  ;  antennae  about  equul  in 
length  to  the  width  of  head,  piceous-black,  very  slightly  paler  toward  tip, 
club  moderate;  third,  fourth,  and  fifth  joints  decreasing  nearly  uniformly 
and  very  gradually  in  length,  sixth  and  seventh  sub-equal  in  length  and 
much  shorter,  last  two  joints  much  thicker  than  the  ninth  ;  maxillary  palpi 
short  and  robust,  piceous-black,  first  joint  paler.  Prothorax  robust  and 
somewhat  cordate,  widest  well  before  tlie  middle,  where  it  is  three-fourths 
as  wide  as  the  head,  aiui  nearly  one-sixth  narrower  than  long  ;  sides  thence 
moderately  convergent  posteriorly  and  slightly  sinuate  ;  anterior  margin 
slightly  longer  and  much  more  arcuate  than  the  posterior  ;  surface  somewhat 
longitudinally  ridged  at  the  sides  toward  the  b.ase,  finely  and  irregularly 
punctate;  punctures  impressed,  very  distant  in  the  middle,  closer  toward  the 
margins  ;  interspaces  very  convex,  highly  polished  ;  canaliculation  nearly  as 
long  as  the  pronotum,  narrow,  deep,  equally  wide  throughout.  Elytra  at 
base  distinctly  wider  than  the  head;  sides  just  perceptibly  divergent  poste- 
riorly, as  long  as  the  width  at  base,  feebly  arcuate  ;  together  broadly  and  very 
feebly  emargiuate  behind  :  suture  one-fifth  as  long  again  as  the  pronotum  ; 
surface  somewhat  uneven,  rather  finely  and  evenly  punctate;  punctures  im- 
pressed ;  interspaces  nearly  as  wide  as  the  punctures,  very  convex,  highly 


COLEOI'TERA. 


109 


polislu'd.  Abdominal  segments  rlecieasing  nniformly  <anil  rather  rapiilly  in 
width,  first  as  wide  as  tlie  contiguous  elytra:  surface  very  convex,  highly 
polislicd,  densely  hirsute,  very  finely  and  sparsely  ])unctulate ;  transverse 
carinao  4-cuspid,  cusps  etjual  in  length,  ratlier  approximate,  tinely  aeieular. 
Legs  short,  dark  piceous  ;  first  joint  of  the  posterior  tarsi  scarcely  one-fourth 
as  long  again  as  the  second,  much  shorter  than  the  last,  first  four  joints 
decreasing  nearly  uniformly  in  length. 

Malf. — Posterior  edge  of  tlie  fiftli  ventral  segment  scarcely  perceptihly 
and  very  hroadly  sinuate;  sixth  broadly  emarginate  at  apex  througliout  it? 
wi'lMi,  emargination  evenly  rounded  throughout,  about  ten  times  as  wide  as 
dee]). 

Fcmiile. — Unknown. 

Length  2.7  mm. 

Fort  Garland,  Colorado,  1. 


S.").  S.  villosus  n.  sp. — Form  moderately  robust.    Pubescence  long,  very 
denst>,  recumbent,  fine,  cinereous,  and  conspicuous.     Head  small,  twice  as 
widt;  as  long  ;  interocular  surface  two  and  one-half  times  as  wide  as  the  eye, 
very  slightly  convex  ;  equally  trilobed  by  the  moderately  strong  siilcations  ; 
intermediate  surface  evenly  convex,  summit  impunctate ;  punctures  ratlier 
coarse,  variolate,  rather  distant,  evenly  distril)uted  ;  ocular  lines  meeting  at 
three  to  four  lengths  in  advance  ;  iirst  two  joints  of  antennae  biack,  mandi- 
bles fuscous  at  tips.     Prothorax  widest  before  the  middle,  where  it  is  four- 
fifths  as  wide  as  tlie  head,  and  one-fifth  narrower  than  long ;  sides  tlieiice 
very  moderately  convergent  posteriori}-,  and  very  strongly  sinuate  ;  anterior 
margin  shorter  and  much  more  arcuate  than  the  posterior  ;  surface  faintly 
swollen  at  the  sides,  particularly  toward  the  base,  finely,  distantly,  ai;d 
evenly  punctate ;  punctures  deeply  impressed ;  interspaces  wider  than  the 
punctures,  convex,  very  highly  polished  ;    canaliculation   as   in   millv)ii,rus. 
Elytra  at  base  distinctly  wider  than  the  bead  ;  sides  rather  feebly  divergent 
posteriorly,  much  longer  than  the  width  at  base,  rather  strongly  arcuate ; 
together  broadly,  roundly,  and  just  perceptibly  emarginate  behind;  suture 
about  one-third  as  long  again  as  tlie  pronotum  ;    surface  rather  strongly 
impressed  along  the  suture  toward  tlie  base,  and  also  feebly,  longitudinally, 
and  somewliat  indefinitely  impressed  toward  the  middle  of  the  l)ase  of  each 
elytron,  finely  and  evenly  punctate  ;  punctures  deeply  impressed  and  very 
seldom  coalescing,  much  smaller  toward  the  base  ;  interspaces  as  wide  as  the 
punctures,  convex,  very  highly  polished.     Abdominal  segments  decreasing 
uniformly  and  rather  gradually  in  width,  first  very  slightly  narrower  than 
the  contiguous   elytra  ;    surface  broadly  convex,   highly  polished  ;    finely, 
ratlier  sparsely,  and  evenly  punctulate  ;  transverse  carinae  4-cuspid,  cusps 
equal,  rather  approximate,  finely  aciculate  and  prominent.      Legs  stout, 
pic(!ous-black,  femora  black  ;  first  joint  of  the  posterior  tarsi  one-half  as  long 
again  as  the  second,  distinctly  shorter  than  the  fiftli,  second  and  third  sub- 
equal,  fourth  very  slightly  shorter. 

Male — Fifth  ventral  segment  very  feebly  fiattened  in  its  middle  fourth 
throughout,  edge  scarcely  modified  ;  sixth  segment  very  broadly  sinuate  at 


i  1 


I 

if 


' 


w 


no 


NORTH    AMKRICAN 


■  f; 


w  ■ 


If 


;f  '-m 


apex,  siinis  evenly  rounded,  extending  through  nearly  the  entire  segmental 
.tidtli,  ten  to  twelve  times  as  wide  as  deep. 

Feiniile. — Unknown. 

Length  3.0  mm. 

Ciilitbrniii,  1. 

Tlie  antennae  are  missing  with  exception  of  tlie  first  two  joints, 
ami  tlic  maxillary  palpi  are  also  wanting. 

Tlie  sj)ecies  somewiiat  resembles  iuilfeporns  and  ri'nnuliis,  but 
differs  from  both  in  the  relative  lengths  of  tiie  elytra  and  prothorax, 
and  from  tiie  latter  in  addition,  by  its  much  narrower  head  and  dense 
pubescence. 

86.  S.  sectilifer  n.  sp. — Form  moderately  robust.  Pubescence  of  head, 
proiiotum,  and  elytra  so  line  and  sparse  as  to  be  scarcely  visible,  cinereous; 
that  of  abdomen  also  very  fine,  semi-erect,  and  exceedingly  sparse,  cinereous. 
Head  small,  scarcely  twice  as  wide  as  long  ;  interocular  surface  nearly  flat, 
ecjually  trihdx'd  by  the  longitudinal  sulcations,  which  are  just  apparent; 
evenly  jtunctate  ;  punctures  small  and  impressed  ;  interspaces  slightly  wider 
than  the  punctures,  highly  polished  ;  ocular  lines  meeting  at  one  and  one- 
half  lengtlis  in  advance ;  antennae  slightly  longer  than  the  width  of  head, 
slender,  dark  fuscous,  club  moderate ;  third  joint  one-lifth  as  long  again  as 
tlu!  fourth,  joints  four  to  seven  gradually  dettre.asing  in  length,  joints  of  club 
gradually  increasing  in  length,  ninth  much  narrower  than  the  last  two, 
eleventh  acuminate  at  tip;  first  five  joints  nearly  glabrous  ;  maxillary  palpi 
slender,  flrst  joint  testaceous,  second  darker,  third  black.  Prothorax  widest 
slightly  before  the  middle,  where  it  is  much  wider  tlian  the  interocular  sur- 
face, sides  thi^ice  nearly  parallel  posteriorly  and  sinuate,  length  one-eighth, 
greater  than  the  width  ;  anterior  margin  shorter  ai  '  much  more  arcuate 
than  the  posterior ;  surface  evenly  convex,  with  a  nam.  ,  shallow  and  equal, 
longitudinal  canaliculation,  terminating  at  a  very  slmrt  distance  from  either 
margin;  rather  finely  punctured  and  transversely  regulose ;  interspaces 
highly  polished.  Elytra  at  base  much  wider  than  the  head,  sidijs  almost 
parallel  and  slightly  arcuate,  more  so  posteriorly  ;  together  broadly  and  very 
feebly  emarginate  behind  ;  length  of  suture  slightly  greater  than  that  of  the 
pronotum  ;  surface  gencu'ally  convex,  with  a  slight  oblique  impression  just 
before  the  middle  of  each,  and  anotlna-  near  the  outer  apical  angle;  quite 
evenly  punctate  ;  punctures  small  and  dee])ly  impressed  ;  interspaces  much 
wider  than  the  punctures,  highly  polished.  First  three  abdominal  segments 
nearly  eciual  in  width,  and  almost  imperceptibly  narrower  than  the  elytra 
behind  ;  surface  highly  polished,  finely  and  distantly  punctulate  ;  transverse 
carinae  acutely  and  finely  4-cusi)id,  intervals  sinuate.  Legs  short,  black, 
femora  .and  tibiae  nearly  glabrous,  tarsi  slightly  paler  ;  first  joint  of  posterior 
three-fourths  as  long  again  as  the  second,  second  much  longer  than  the  third. 
Under  surface  of  the  abdomen  punctate  like  the  dorsal  surface. 

Mole. — Unknown. 

Female. — Posterior  edge  of  sixth  ventral  segment  evenly  rounded. 

Length  3.8  mm. 

District  of  Columbia,  1. 


COLEOPTKRA. 


Ill 


87.  S.  inilleportis  n.  sp.  (Fan vol  MS.). — Form  moderately  robust, 
males  more  slender.  Pubescence  very  long,  erect,  moderately  dense,  dark 
cinereous.  Head  very  small,  twice  as  wide  as  long  ;  interocular  surface 
very  slightly  convex,  eriually  triloiteil  by  the  conspicuous  sulcations ;  interme- 
diate surface  evenly  convex  ;  punctures  largo,  round,  impressed,  and  close; 
interspaces  very  convex  and  highly  polished  ;  ocular  lines  meeting  at  three 
■  ir  four  lengths  in  advance;  antennae  slendt^r,  much  longer  than  the  width 
of  hea<l,  coarsely  setrse,  base  black,  remainder  piceous,  club  distinct ;  joints 
three  to  six  sub-equid,  sixth  vry  slightly  longer  than  the  seventh,  eighth 
elongated  slightly,  joints  of  club  increasing  in  'ength,  last  two  very  robust; 
maxillary  palpi  j)ice()us,  first  joint  i)aler.  FiOlhorax  widest  slightly  bc^fore 
tlie  middUt,  where  it  is  from  one-sixth  to  one-seventh  narrower  than  long; 
sides  thence  just  perceptibly  convergent  posteriorly  and  deeply  sinuate; 
anterior  margin  very  slightly  longer  and  more  artniate  than  the  posterior ; 
surface  Hat  above,  abruptly  declivous  at  the  sides  :  deeply,  closely,  and 
irregularly  punctate;  interspaces  very  convex,  liighly  polished:  canalicula- 
tion  as  in  riiiniilitK.  Elytra  at  base  wider  than  the  head  ;  sides  very  feebly 
divergent  posteriorly,  rather  strongly  arcuate,  and  very  slightly  longer  than 
the  basal  widtli  ;  together  broadly  and  just  perceptibly  emarginate  behind  ; 
suture  one-sixth  as  long  again  as  the  ])ronotum  ;  surface  convex,  impressed 
along  the  suture  and  near  the  outer  apical  angles,  coarsely,  rather  closely, 
and  somewhat  irregularly  punctate;  punctures  round,  deeply  impressed, 
and  varying  in  size  ;  interspaces  convex  and  highly  polished.  Abdominal 
segnit!iits  decreasing  unitormly  in  width,  rajiidly  in  the  males,  slowly  in  the 
fen)ales  ;  flrst  narrower  than  the  contiguo 'S  elytra  ;  surface  convex,  coarsely 
and  closely  punctulate  at  the  sides,  impunctate  and  highly  polished  along 
the  middle;  transverse  carinae  4-cuspid,  cusps  api)roximate,  long,  acicular, 
l)roniinent ;  under  surface  coarsely  )uinctulate  at  base,  becoming  very  finely 
and  closely  so  at  tip  ;  clothed  rather  sparsely  with  long  semi-erect  setae. 
Legs  short,  moderately  slender,  black ;  tarsi  slightly  paler  ;  first  joint  of 
posterior  tarsi  one-half  to  two-thirds  as  long  again  as  the  second,  second 
longer  than  the  third,  third  and  fourth  sub-equal. 

Mule. — Posterior  edge  of  the  fifth  ventral  segment  transverse  in  some 
specimens,  just  jierceptibly  sinuate  in  others,  surface  neither  impressed  nor 
llatteiied ;  sixth  segment  sinuate  at  ai)ex,  sinus  much  broader  than  the 
apices,  evenly  rounding,  five  times  as  wide  as  deep ;  seventh  deeply  emargi- 
nate at  tip,  bottom  of  emargination  transverse,  teeth  very  long  and  slender. 

Fi'iiKile. — Sixth  segment  very  broadly  angulate  at  tip  ;  seventh  sometimes 
irregularly  and  deeply  serrate  at  tip. 

Length,  males,  3.0  mm. ;  females,  4.0  mm. 

New  York,  3 ;  St.  Catharine  Island,  Georgia,  3 ;  Florida,  7 ; 
Unknown,  3. 

Kesembles  vinnah(s,  but  differs  in  the  pubescence,  in  the  coarser 
and  closer  elytral  punctuation,  and  in  the  sexual  characters. 

A  specimen  of  this  species  affords  one  of  the  few  instances  which 
I  have  observed,  in  which  the  liiigula  with  the  paraglossae  has  been 
protruded  ;  it  seems  to  be  an  exceedingly  rare  phenomenon  in  the 
American  representatives  of  the  genus. 


c   ' 


TT 


112 


NORTH    AMEUICAN 


.,11  I 


88.  S.  jejill'llH  n.  sp. — Form  robust.  Pulit'sconct*  rather  aliuiidaut, 
seiiiiMTt'ut,  L'iii iiMMHis,  iiioil('i'at(>  in  li'iif;tli.  Head  sini'll,  scarci-ly  twice  as 
wide  as  long;  intorouular  biirl'acu  Ihn,  a  little  more  than  twice  as  wide  as  the 
eye,  finely  and  ratlier  closely  punctate;  sulcations  Hhallow,  'lut  distinct; 
ocular  lines  meeting  at  about  two  luiigths  in  advance  ;  antennae  very  short 
and  robust,  scarcely  as  long  as  the  width  of  head,  dark  fuscous,  sparingly 
setose,  club  distinct ;  joints  three  to  live  equal  in  h-ngth,  six  and  seven  e(]ual, 
last  twoe(iual,  very  large,  sub-globular,  ninth  very  uiuch  suiiiUer;  maxillary 
palpi  slender,  piceous-black.  base  of  first  joint  slightly  })uler.  Prothorax 
widest  just  before  the  middle,  wh(^ro  it  is  four-liiths  as  wide  as  the  head  ; 
sides  thence  convergent  slightly  posteriorly,  sinuate  ;  length  slightly  greater 
than  width  ;  anterior  and  j)osterior  margins  ecjual  in  length  and  e(iually 
arcuate;  surface  rather  evenly  convex  ;  deeply,  rather  finely  and  irregularly 
punctate  ;  interspaces  moderately  shining  ;  a  long,  narrow  and  equal  medial 
canaliculation  exten<ls  to  within  a  ver^  short  distance  of  eithtsr  margin. 
Elytra  at  base  perceptibly  wider  than  tlu  head  ;  sides  divergent  posteriorly 
and  arcuate  ;  togethi^r  broadly  and  feebly  emargiiiate  behind  ;  suture  one- 
iifth  as  long  again  as  the  pronotum  ;  surface  of  each  slightly  swollen  near 
the  iniuu'  basal  angles;  deeply  and  rather  un(>venly  punctate  ;  punctures 
impressed,  intersi)aces  generally  wider  than  the  punctures,  shining.  Abdo- 
iTjinal  segments  decreasing  moderately  and  evenly  in  width  posteriorly,  first 
narrower  than  the  elytra  ;  very  finely  and  rather  closely  punctulate  ;  surface 
m«'j  lerately  shining  ;  transverse  carinae  4-cubpid,  cusps  having  the  points 
expanded,  intervals  strongly  sinuate.  Legs  moderate,  dark  piceous-black, 
tarsi  very  slightly  paler;  first  joint  of  the  posterior  about  twice  as  long'as 
the  Second,  second  slightly  longer  than  the  thinl.  Under  surface  of  th(f 
abdouu'u  much  more  coarsely  and  distantly  punctulate  than  the  upper, 
having  the  surface  more  liighly  polished. 

Mule. — Posterior  edge  of  the  fifth  ventral  segment  very  broadly  and  feebly 
bilobed  ;  sixth  very  broadly  and  strongly  sinuate  at  apex,  depth  of  sinus 
equal  to  one-fifth  its  width  ;  seventh  segment  deeply  emarginate  at  apex. 

/•'eiiuile. — Unknown, 

Length  3.0  nun. 

Bt'itisli  Columbia,  1. 


89.  S.  vinilUlUS  n.  sp. — Form  moderately  robust.  Pubescence  long, 
semi-erect,  fine,  rather  abundant,  piceo-cinereons  on  the  elytra  and  abdomen, 
shorter  and  erect  on  the  head  and  prothorax.  Head  moderate,  twice  as  wide 
as  long ;  interocular  surface  Hat,  more  than  twice  as  wide  as  the  eye ;  equally 
trilobed  by  the  scarcely  perceptible  sulcations  ;  intermediate  surface  evenly 
and  feebly  convex  ;  punctures  closely  crowded,  small,  polygonal,  and  some- 
times coalescent ;  antennae  much  longer  than  the  width  of  head,  slender, 
coarsely  setose,  basal  joint  black,  remainder  piceous-black,  club  not  con- 
spicuous ;  third  joint  one-fourth  as  long  again  as  the  fourth,  fourth  slightly 
longer  than  the  fifth,  sixtli  and  seventh  of  equal  length,  eighth  twice  as  long 
as  wi<ie,  oonoidal,  joints  of  club  of  nearly  equal  Ituigth,  increasing  in  width, 
ninth  conoidal,  last  ovoidal ;  first  joint  of  maxillary  palpi  piceo-testaceous, 
base  of  second  same,  remainder  piceous.    Prothorax  elongated,  widest  slightly 


> 


COLEOrTKRA. 


113 


lu'l'orc  till'  iniddli',  wlu-rc  it  is  tlirci'-t'ourtlifl  as  wide  as  tlir  liciid,  (uid  oin'- 
foiiitii  iiMi'iowt'i'  tliaii  Idii^  ;  Hi(i(!S  tliiMic"  iiiodcr.'itcly  coiiviM'f^cnt  and  sli^litly 
simioiis  ;  anterior  and  posterior  inar^'ins  e<iiuil  in  cnrvaturc,  the  loiniiT 
iiotictmbly  longer  ;  surface  strongly  declivous  /it  tlio  Hides  ;  rntlier  finely, 
somewhat  irregnl.'iily  luinctate  ;  jninetures  deeply  inipressi'(l  and  s<iinetiines 
(Mialescetit ;  intei'sjiaces  nearly  as  wide  as  the  pnnctures,  very  convex,  highly 
polished  ;  cnnaliciihition  long  and  narrow,  sides  soniewhiit  irregularly  out- 
lined, terminating  within  vi^ry  short  distances  of  the  margins.  Elytra  at  hase 
as  wide  as  the  head  ;  sides  very  feidily  divergent  posteriorly  and  strongly 
arcuate,  longer  than  breadth  at  hasH  ;  together  broadly  nnd  just  perceptibly 
emarginate  behind  ;  suture  very  slightly  longer  than  the  pronotuni  ;  surface 
convi'X,  impressed  .along  the  sutui'e,  niorc^  deeply  so  towfird  the  base  ;  moder- 
ately coarsely,  deeply,  and  rather  irr.'gularly  i)unctato  ;  punctures  sehloui 
coiJescent ;  interspace  generally  as  wide  as  the  ]>unetures,  very  convex, 
liighly  polished.  Abdominal  segments  decreasing  uniformly  and  rather 
rapidly  in  widtli,  first  scarcely  as  wide  as  the  contiguous  elytra  ;  surface  very 
convex,  highly  polislicil,  sparsely  and  (iuely  puuctulate  ;  transverse  carinae 
4-cuspid,  cusi)s  equal  in  length  and  equidistant,  aciculate  and  prominent, 
intervals  but  slightly  sinuate.  Legs  slender,  moderate  in  length,  black, 
tarsi  piceous-black  ;  lirst  joint  of  posteiior  tarsi  foui'-lifths  as  long  again  as 
the  second,  second  and  third  sub-ecjual,  fiftli  as  long  as  the  first.  Under 
surface  of  the  abdomen  densely  clothed  with  long,  piceous,  sub-recuuibent 
setae. 

Male. — Posterior  edge  of  the  fourth  ventral  segment  emarginate  in  its 
middle  two-fifths,  emargination  evenly  rounded  and  just  ]iercei)tible,  con- 
tiguous surface  feebly  impressed  for  a  short  distance  anteriorly  ;  fifth  emar- 
ginate in  its  middle  third  at  a])ex,  emargination  feeble  and  evenly  rounded, 
contiguous  surface  flattened  throughout  for  the  same  width  anteriorly-;  si.\th 
segment  sinuate  at  tip,  sinus  broad,  evenly  roundcid,  much  wider  than  the 
apices,  six  times  as  wi<le  as  deep;  s(!V(nith  <leeply  emarginate  at  ti]),  bottom 
of  emargination  transverse,  sides  produced  in  long,  lateral,  setigerous  teetli. 

FiiiKile. — iiixth  segment  broadly  truncate  at  lip,  truncation  arcuate;  tip  of 
seventh  segment  most  irregularly,  acutely,  and  deeply  serrate. 

Length  3.1-4.0  mm. 

Cainbriilge,  Massachusetts,  G;  White  Fish  Point,  Lake  Superior,  3; 
Isle  Hoyale,  Lake  Superior,  1  ;  Marquette,  Michigan,  1. 

In  tlie  males  the  al)dominal  segments  decrease  mucli  more  rapidly 
than  in  the  females. 

I  had  already  separated  and  described  the  Western  specimens  as 
distinct,  when  I  discovered  that  the  characters  upon  which  the  sepa- 
ration was  based  were  so  variable  as  to  be  comparatively  valueless. 
The  tarsal  structin-e  varies  considerably  in  the  proportional  lengths 
of  the  first  three  joints  ;  the  intervals  of  the  carinal  cusps  are  also  by 
no  means  constant.  The  sinus  in  the  specimen  from  Isle  Royale, 
Lake  Superior,  is  much  deeper  than  in  the  others,  and,  as  a  rule,,  the? 
Stemsf.  8 


w 


111 


NOIITII    AMERICAN 


'!  '1 


ii 


S.v 


Westtrn  specimens  arc  smallfr  and  more  hU'ikIit,  witli  a  narrower  Iit-ad 
anil  soint'wliat  sliortor  j)rotliorax,  than  tlios(;  from  IMassaclinsctts. 

Tlic  s|>('ci('s  of  lliis  snbdiv  i;rKin  lliiis  far  coiisidfrctl  have  cost  nioro 
time  anil  trouble  in  tlieir  s('|iaration  and  d(•^4cri^)tio^  than  tho.su  in  any 
other  portion  of  the  penus  of  eipiul  extent ;  one  or  two  of  them  may 
sid)se(inentiy  be  found  to  be  varieties,  bnt  with  tlie  present  material 
before  me  I  can  see  no  other  eoiirse  than  to  consider  them  as  species. 

OO.  S,  COiiK<'iiCl'  Miikl. — Form  very  nioiluratidy  rolniHt.  I'libi-si-ence 
moderately  loii^',  close,  tine,  semi-erect,  very  jic'ile  Ihivo-cinHreoiis.  Head 
moderatt^,  robust,  twice  as  wide  as  long  ;  jaliruui  very  lai'gf  ;  interociilar 
Hurface  Very  slightly  convex,  more  than  twice  as  wide  as  the  »»yo ;  rather 
tioarsely,  very  closely,  and  evenly  jmnctate;  hearing  no  evidences  of  the  sul- 
cations  ;  ocular  lines  meeting  at  slightly  more  tlian  two  lengtlis  in  advance  ; 
nnttuinae  sliglitly  longer  than  tluf  width  of  liead,  rather  slender,  ciub  distinct, 
dark  jiiceous-brown,  hjisal  joints  black  ;  third  joint  shorter  than  the  fourth, 
sixth  and  seventh  e([ual  in  length,  eighth  much  elongated,  oval,  joints  of 
club  robust,  increasing  in  length,  last  two  very  robust;  maxillary  jialpi  dark 
piceous,  l>aHal  joint  testaceous.  Prothorax  robust,  widest  at  the  middle, 
where  it  is  nearly  live-sixths  as  wide  as  the  head,  and  just  j)erce|)tibly 
narrower  than  long;  sides  thence  moderately  convergent  jiostcriorly  and  dis- 
tinctly sinuate ;  anterior  nwirgin  slightly  hmger  than  the  posterior,  enually 
arcuate  ;  surface  indistinctly  tul)erculate  near  each  basal  angle  ;  deeply, 
very  idosely,  and  evenly  punctate,  intt^rspaces  minutely  granulate  ;  cauali- 
cnlation  as  in  cuiuiliculdlus,  but  more  indistinct.  Elytra  at  base  as  wide  as 
or  very  slightly  wider  than  the  head  ;  sides  moderately  divergent  posteriorly, 
feebly  arcuate  and  much  longer  than  the  width  at  base;  together  broadly, 
roundly,  and  moderately  emarginate  behind  ;  suture  rather  more  than  one- 
fourth  as  long  again  as  the  pronotum  ;  surface  feebly  impressed  along  the 
suturi',  more  strongly  so  toward  the  base,  linely,  moderately  closely,  aiul 
very  t;venly  punctate  ;  interspaces  tlat,  distinctly  reticulate.  Abdominal 
segments  decreasing  uniformly  and  very  gradually  in  width,  lirst  as  wide  as 
the  contiguous  elytra  ;  surface  broadly  convex  ;  rather  minutely,  closely,  and 
evenly  puuctulate,  minute  reticulations  not  evident,  interspaces  polislo^d  ; 
transverse  carinae  4-cuspid,  cusps  equal,  equidistant,  moderately  api)roxi- 
mate,  fii'ely  aciculate.  Legs  rather  short  and  slender,  black,  piceous  toward 
tips,  tarsi  slender  ,  first  joint  of  posterior  one-third  as  long  again  as  the 
second,  and  scarcely  three-fourths  as  long  as  the  last,  first  four  joints  almost 
uniformly  decreasing  in  length,  fourth  moderately  thin  and  oblique,  densely 
clothed  beneath  with  long,  cinereous  setae. 

Mule, — Posterior  edge  of  the  fifth  ventral  segment  just  perceptibly  and 
not  measurably  sinuate  ;  sixth  sinuate  at  apex,  sinus  rather  more  acutely 
rounded  at  the  bottom  than  the  apices,  about  three  times  as  wide  as  deep . 
seventh  segment  rather  feebly  emarginate  at  tip.  ,  . 

Female. — Sixth  segment  evenly  rounded  behind.  *  / 

Length  3.0-3.2  mm.  '        ,        " 

Alaska,  2.  .  ■ 


COLEOl'TKJtA. 


ii:» 


I  am  not  certuiii  us  to  tlie  t»;iiiiik'  st^xuiil  cluiiactors,  the  ly\w  l)ciii<f 
(laiiia<;iMl. 

Tliis  8[>eciea  is  very  distinct  from  cunaficnfiitns  :  tlicy  iVitthv  in 
tarsal  strii<;tiin',  in  llic  rciativti  Imjrtlis  of  (lie  proliiorax  ami  elytra, 
uiKJ,  aitlioii;^li  till"  cliaractcr  of  >Au'.  stxiiul  niotlifications  i.s  the  same, 
they  (lifli-r  conspiciioiisiy  in  degree. 

in.  §.  caiialicillatUH  (Jyll. — Form  ratlicr  rolaist.  l'iil)csccnci!  moilc- 
rntc  in  l('iij,'th,  ratlifr  conrsn,  doso,  Hub-rt-ciiinbiint,  j)nl('  iiicno-cinercdiis. 
Head  Ifirgi-  and  rdlmst,  twin'  as  wiilc  as  loiijj ;  inti-rociilar  siirfjicf  t'ccMy 
CDiivi'X,  twice  as  wide  as  tlie  eye,  ratluT  tiliely,  deeply,  very  closely,  and 
evenly  punutate,  witlioiit  a  trai^e  of  siiluntions  or  longitudinal  elevation  ; 
ocular  lines  meeting  at  raflier  more  than  two  lengths  in  advance;  anti'unae 
scarcely  as  long  as  the  width  of  head,  hiack,  slightly  paler  at  tip,  slender, 
club  vrry  moderate;  third  joint  one-llfth  as  long  again  as  the  fourth,  fourth 
and  lifth  eiiual.  sixth  and  seventh  eiinal  in  length,  the  latter  thicker,  eighth 
oval,  very  small,  naiTower  than  the  seventh,  joints  of  cliih  increasing  in 
length,  the  last  two  of  ecjual  thickness  ;  maxillary  palpi  piceous-black,  tirst 
joint  and  base  of  second  pale  testaceous.  Prothorax  robust,  widest  slightly 
before  the  middle,  where  it  is  three-fourths  as  wide  as  the  head,  and  dis- 
tinctly narrower  than  long  ;  sides  thence  moderately  convergent  jjosteriorly 
and  slightly  sinuate  ;  anterior  margin  very  slightly  longer  than  the  jxisterior, 
e(jnally  an'Uate  ;  surface  nearly  evenly  convex,  very  closely,  finely,  deeply, 
and  evenly  punctate;  cajialiculation  narrow,  e(jual  in  width  tliroiighont,  as 
long  as  the  pronotum.  Elytra  at  base  slightly  narrower  than  the  lica*!,  and 
but  very  slightly  wider  than  the  prothorax  ;  aides  moderately  divergent 
posteriorly,  slightly  longer  than  the  width  at  base,  and  feebly  arcuate; 
together  broadly  and  moderately  emarginate  behind  ;  suture  about  equal  in 
length  to  the  pronotum  ;  surface  convex,  narrowly  and  feebly  impressed  along 
the  suture;  deeply,  (dosely,  and  evenly  punctate;  punctures  very  seldom 
coalescing  ;  interspaces  narrow,  convex,  minutely  reticulate.  Abdominal 
Segments  decreasing  uniformly  and  very  gradually  in  width,  first  as  wide  as 
the  contiguous  elytra;  surface  broadly  convex;  finely,  very  closely,  and 
evenly  punctulate  ;  transversi;  carinae  4-cuspid,  cusps  nearly  eijual,  rather 
approximate,  finely  aciculate.  Legs  moderati.',  black  above,  piceous-black 
beneath  ;  first  joint  of  the  i)osterior  tarsi  three-fourths  as  long  again  as  the 
second,  as  long  as  the  fifth,  joints  two  to  four  decreasing  uniforndy  and 
rapidly  in  length,  fourth  thin  and  obliiiue,  having  long  cinereous  setae 
beneath.     Body  winged. 

.  Mull'. — Posterior  edge  of  the  fifth  ventral  segment  very  feebly  emarginate  in 
its  middle  fourth,  emargination  <^venly  rounded  and  just  percejjtible  ;  sixth 
sinuate  at  apex,  sinus  very  broad  and  evenly  rounded  throughout,  about 
eight  times  as  wide  as  deep,  surface  piceous-black. 

Feiudle. — Sixth  ventral  segment  broadly  and  evenly  rounded  behind. 

Length  3.2-3.4  mm. 

Cambridge,  Massachusetts,  2 ;  White  Fish  Point,  Lake  Superior, 
2 ;  Lake  Superior  (locality  unknown),  1 ;  Grimsby,  Ontario,  3. 


}' 


n 


i 


1 1« 


■I: 


116 


NOHTIl    AMKUICAN 


TIm'  iiltova  description  seems  to  iijirce  in  all  essential  points  witii 
that  jiiven  hy  ICriclison  for  the  European  ratKilicnhitns,  hut  having 
no  s|)cciniens  of  the  hittiT  for  eoniparison,  I  cannot  state  that  tlie 
idenlilieation  is  eonelnsive. 


vr 


ij'i 

rj 

[i.  i' 


02.  S.  rarolinap  n.  sp. — Form  rntlicr  slfudcr.  PiilinHctMicc  iiKKlcrnfcly 
done,  cxti't'ini'ly  loiijc,  conrst^,  erect,  pjile  hiseiiiis  in  cdIop.  Head  riitlier 
siiiiitl,  iidt  twice  (IS  wide  ns  long  ;  inferocnlar  surface  flat,  coarsely  nnd  (dosely 
|>iiiict;ite.  two  (111(1  oiie-lialf  times  as  wide  as  tli(^  eye  ;  loi)j;itudiiial  elevation 
veiy  slij;lit  but  rattier  aliniptly  limited  at  tlie  sides;  antennae  slen<ler,  very 
sliplitly  lonjjer  than  the  width  of  Imad,  fuscous,  coarsely  setose,  club  dis- 
tinct ;  thir<l  joint  one-third  as  lonj;  np:ain  as  the  fourth,  Joints  six  and  seven 
erinal  in  len<,'th,  ten  and  eleven  eciii/il  in  thicl<ness,  and  notalily  longer  tlian 
the  ninth,  eleventh  much  lonijer  than  the  tenth,  acuminate  at  tip  ;  maxillary 
palpi  liavo-testnceous,  slightly  darker  toward  the  tip.  Prothorax  widest 
before  the  nuddle,  where  it  is  four-fifths  as  wide  as  the  head,  and  one-sixth 
narrower  than  long,  sides  tlienc(*  gently  convergent  jwisteriorly,  and  nearly 
straight  ;  surface  having  an  irregular  longituilinal  elevation  ut  eat^h  sid(% 
and  a  slight  transverse  depression  juHt  behind  the  anterior  margin,  coarsely 
niul  somewhat  irregularly  j)un(^tate  ;  jiunctiires  deeply  imjjicssed  ;  inter- 
spaces generally  eijual  to  about  one-half  their  width,  highly  jiolislied. 
Elytra  at  baso  just  perceptibly  wider  than  the  head;  sides  almost  parallel, 
rather  strongly  arcuate  toward  the  ajiices  ;  together  broaiUy  and  very  feebly 
emarginate  behind  ;  suture  about  one-sixth  as  long  again  as  the  pronotiim; 
surface  of  each  slightly  swollen  at  the  base  near  the  middle  ;  coarsely,  some- 
what regularly  jiunctate  ;  ]Minctures  dei'ply  impressed;  intiu'spaces  one-half 
as  wid",  highly  polished.  Abdominal  segments  decreaniiij,  -xtremely  gradu- 
ally in  width,  first  nearly  as  wide  as  tlie  elytra,  border  moder,-  tely  prominent ; 
surface  convex,  highly  ])olished,  coarsidy  j)Unctulate  ;  transverse  ,'arinae 
obscurely  cusped  and  finely  serrulate-,  cusjis  very  short,  rounded  at  tip. 
Legs  rather  short  and  stout,  rufo-testaceous,  tarsi  ))aler  ;  first  joint  of 
posterior  two-thirds  as  long  again  as  the  second,  next  three  joints  gradually 
decreasing  in  length.  Under  surface  of  the  abdomen  more  finely  pnnctulate, 
l)lack,  terminal  segments  paler. 

Mtil<\ — Posterior  edge  of  tln^  sixth  ventral  segment  broadly  emarginate, 
emargination  evenly  rounded,  eight  times  as  wide  as  deep  ;  seventh  deeply 
enmrginate  at  apex,  with  the  sides  ])roduced  denticulately. 

Female. — Sixth  segment  broadly  rounded  behind. 

Length  2.8-3.0  mm. 

Southern  States,  3;  Selma,  Alahama,  1;  Tallahassee,  Florida,  1. 
Tiie  coarsely  herissate  vestiture  of  this  species  renders  it  vtry  dis- 
tinct. 

93.  S>  ageilS  n.  sp. — Form  rather  robust.  Pubescence  somewhat  sliort, 
cinereous,  evenly  distributed,  sub-recumbent,  flue,  and  rather  close.  Head 
nioderate,  twice  as  wide  as  long  ;  interocular  surface  more  than  twice  as  wide 
as  the  eye,  feebly  convex  ;  sulcations  almost  obsolete  ;  punctures  very  deep, 


f 


COI-KOITKKA. 


117 


I'loHc,  iiiriili>riit(t  ill  H\/A',  romiil,  not  lioaliMctMit,  evenly  ilinfi'lliiituil ;  iiittirn|)aii'rt 
fi!<>lily  HliiiiinK  ;  cxiulnr  liiit-x  iiio'tiiif;  iit  onHniid  ont'-liair  l<«ii|^tliH  in  ndviinct); 

anti'nnai'  Hiinicwliat  limber  tlian  tlic  wiiltli  of  lioail,  rullnT  slfiidiT,  pii \\a- 

h\iu:k,  dull  iiMMliTutc  ;  tliii'il  Joint  onc-liaif  lon^'iT  tlian  tlic  fourtli,  ronitii 
and  flftli  snli-cijnnl,  xixth  distinctly  lon);<'i-  and  Iomm  rolnixt  tlian  tlio  s*>vfnth, 
cifflitli  sli;,'litly  lon>;cr  tlian  wide,  as  hrond  an  tin'  scvcntii,  rcKiilarly  oval, 
joints  of  clul)  incrcasiii);  very  sli^litly  in  Icn^itli,  last  two  notalily  inort'  robust 
than  tilt)  ninth  and  (-qnal  in  thickiu'ss  ;  niaxillai-y  palpi  iiiodi'iati'  in  li'ii^tli, 
first  joint  picu'o-tfstat'cons,  rci  ..indcr  piccoiis-hlack.  Prothorax  rolmst, 
widest  slifihtly  liffori'  fln'  middle  wliere  it  is  seven-eij,'litlis  as  wide  as  tlio 
head,  and  very  slij^htly  narrower  than  loiij;  ;  sides  theiKe  feiddy  and  evi'iily 
areiiate  anteriorly,  ratlu^r  moro  strongly  eonveffjeiit  posteriorly  and  nearly 
strai;;ht  ;  anterior  margin  slightly  long(^r  than  the  posterior,  e(|nally  arcuate  ; 
surface  very  evenly  convex,  tlnely,  very  (dosely,  and  evenly  punctate;  punc- 
tures roniul,  not  coalescent,  deeply  inipresscil  ;  interspaces  fcchly  convex, 
scaruidy  one-third  an  widii  ax  tlio  punuturoH,  niinut(dy  retiuulato  and  somu- 
what  feeldy  shining.  Elytra  at  base  nearly  as  wide  as  the  head  ;  sides 
moderately  divergent  posteriorly,  slightly  longer  than  tlm  width  at  base, 
distinctly  and  evenly  arcuate ;  together  broadly,  roundly,  and  strongly 
emarginate  ludiinil  ;  suture  one-fourth  longer  than  tin-  pronotum  ;  surface 
impressed  on  the  suture  at  the  base,  and  viM'y  feebly  so  near  the  humeri  ; 
evenly,  rather  llnely,  and  closely  punctate;  punctures  round,  deeply  im- 
pressed ;  interspaces  generally  two-thirds  as  wide  as  the  punctures,  slightly 
convex  and  minutcdy  reticulated.  Abdominal  segments  decreasing  very 
gradually  in  width,  lirst  as  wide  as  the  contiguiuis  elytra  ;  sides  feiddy 
arcuate  ;  border  distinct  on  all  the  segments  ;  surface  very  coarsely,  moder- 
ately closely,  and  evenly  punctate,  much  more  linely  so  posteriorly  ;  trans- 
veise  cariuae  4-cusiiid,  middlt!  cus])s  very  closely  approximate,  shorti-r  than 
the  lateral,  finely  acuminate;  lateral  large,  flntdy  acuminate,  sides  straight. 
Legs  rather  short  and  slender,  jiiceoiis-black  ;  first  joint  of  the  posterior 
tarsi  twice  as  long  as  the  second,  second  much  longer  than  th<j  third. 

,M(ile. — Unknown. 

Female. — Sixth  ventral  segment  very,  broadly  angulato  behind. 

Length  S.tl  mm. 

Cambridge,  Masstu'liusctts,  "2. 

Tilt'  body  is  of  u  grayisii-black  color ;  tlie  species  is  distinguished 
by  the  relative  siiortness  of  tlie  middle  cusps  of  tlieabdoiniiiul  turinae 

94.  S.  pililicus  n.  sp. — Form  very  moderately  robust.  Pubescence 
rather  short,  coarse,  and  sparse,  semi-erect,  pluiuboo-cinereous.  Head 
moderate,  slightly  more  than  twice  as  wide  as  long  ;  interocular  surface  two 
and  one-half  times  as  wide  as  the  eye,  distinctly  convex;  equally  trilobed 
by  the  excessively  feeble  sulcations ;  intermediate  surface  evenly  and  broiadly 
convex,  crest  broadly  and  very  sparsely  punctate ;  punctures  toward  the 
sides  very  closely  crowded,  jiolygonal,  shallow,  rather  small  and  sub-vario- 
late ;  ocular  lines  meeting  at  one  an<l  one-half  lengths  in  advance  ;  antennae 
distinctly  longer  than  the  width  of  head,  slender,  biisal  joint  black,  remainder 
piceous-brown,  slijjhtly  paler  toward  the  tip,  club  distinct ;  joints  three  to 


'  I 


I'  'i| 


}f} 

m 

fii] 


i 
1 

I 


i; 


m 


11 


mf^ 


118 


NORTH    AMKRICAN 


six  imiformly  and  rapidly  decreasing  in  lenj^tli,  six  and  snvcn  snl>  ('(inal  in 
ler^'tli,  tlic  latter  nne-lialf  as  thick  a^ain,  ('ii,'litli  as  liniad  as  tlie  seventh, 
suh-triangiilar,  joints  of  ^ilub  increasin};  in  length,  last  two  of  eijnal  thick- 
ness ,  maxillary  i)al])i  dark  piceons-brown,  first  joint  and  base  of  the  second 
niui-li  ]>aler,  piceo-testace'ons.  Prothorax  arcnately,  evenly,  and  moderately 
rai)idly  increasing  in  width  to  a  point  jnst  perceptibly  in  advani.'(>  of  the 
uii(hlle,  where  it  \a  four-fiftlis  as  wide  as  the  head  and  slightly  narrower  than 
long  ;  sides  thence  moderately  convergent  jiosteriorly  and  feebly  sinnate  ; 
anterior  and  posterior  margins  ecjiial  in  length,  tlie  former  Vi'ry  slightly  the 
more  arcnate  ;  surface  feebly  and  minutely  tiib-^rculato  near  the  basal  angles, 
transversely  and  very  feebly  im])ressed  jnst  behind  the  vertex  ;  pnnctnres 
small,  ronudi'd,  and  irregularly  distril)Uteil,  more  crowded  toward  the  base 
and  apex.  Elytra  at  base  as  wide  as  the  head  ;  sides  very  moderately  diver- 
gent posteriorly,  much  longer  than  the  width  at  base  and  rather  strongly 
arcuat(%  more  particularly  so  posteriorly  ;  together  broadly,  roundly,  and 
strongly  emarginate  behind  ;  suture  one-thini  as  long  again  as  the  pronotum  ; 
surface  convex,  narrowly  impressed  along  the  suture,  more  broadly  and 
strongly  so  toward  the  base  ;  punctures  round,  feebly  impressed,  and  evenly 
distributed,  (>xcept  in  the  basal  regions,  where  they  are  closely  crowded  ; 
intersj)a(u^s  gener'iUy  as  wide  as  the  punctures,  distinctly  reticulated,  feebly 
convex,  shining.  First  two  abdominal  segnionts  equal  in  width,  very  slightly 
nari'ower  than  the  contiguous  elytra  ;  surface  (;oarsely,  feebly,  and  somewhat 
distantly  punctulate  at  the  base,  becoming  nunOi  more  linely  so  toward  the 
tip  ;  transverse  carinae  4-eHspid,  cusps  nearly  equal  in  length,  somewhat  ob- 
scurely delined,  tliougli  rather  long.  Legs  short  and  slender,  dark  piceous- 
browii  ;  first  joint  of  the  i)osterior  tarsi  thi'ee-fonrtlis  as  long  again  as  the 
second,  equal  in  length  to  the  last,  second  somewhat  longer  than  the  third, 
fourth  very  oblique,  fifth  very  slender  at  the  base. 

Male. — Posterior  edge  of  the  fifth  ventral  segment  emarginate  in  its  middle 
fifth,  emargination  evenly  rounded,  and  nearly  ten  times  as  wide  as  d(!ep, 
contiguous  .iirface  cylindrically  and  rather  feebly  impressed  throughout 
anteriorly;  sixth  broadly  and  transversely  truncate  at  the  apex. 

FiiiKite. — Sixth  segment  broadly  and  evenly  rounded  behind. 

Length  2.r)-2.7  nun. 

White  Fisli  Point,  Lake  Superior,  2. 

T  had  sepaiateil  the  nvAe  of  tliis  8i)eoie8  under  anotlier  name,  but 
afterwards  concluded  to  unite  the  two  specimens,  as  tliere  might 
remain  a  doubt  as  to  their  distinctness,  due  to  ti'e  difl'erei.ce  of  sex. 
The  male  diHers  from  the  female  in  the  much  coarser  aiul  more  even 
punctuation  of  the  elytra  and  pronoluui,  in  the  pubescence,  which  is 
very  much  longer  and  denser,  and  in  the  structure  of  the  antennae, 
the  male  having  the  fourth  and  fifth  joints  equal  in  length.  The 
description  is  drawn  from  the  female. 


m 


Of).  S.  minor  n.  sp. — F(/rm  slender.  Pubescence  fine,  moderately  abun- 
dant, rather  short  and  recumbent,  cinereous  in  color.  Head  moderate,  twice 
as  wide  as  long ;   interocular  surface  very  slightly  convex,  more  than  twice 


m 


COLEOPTERA. 


119 


as  wide  uh  tlio  eye;  coarsely,  t'losely,  and  sub-variolately  punctata;  longi- 
tudinal filevation  modttratt'ly  duvelopcd  ;  ocular  lines  meeting  at  three  lengths 
in  advance;  antennae  slender,  niiich  longer  than  the  widtli  of  liead,  dark 
piceous,  cluh  distinct  and  paler  in  color;  third  joint  one-half  as  long  again 
as  the  fourth,  fourtli  and  lifth  equal,  also  the  sixth  and  seventh,  joints  of 
club  gradually  increasing  in  thickness  and  length  ;  maxillary  palpi  uniformly 
dark  piceous.  Prothorax  robust,  widest  at  the  middle,  where  it  is  just  pur- 
(H'j)tibly  narrower  than  long  and  but  little  wider  than  the  interocular  surface  ; 
sides  thence  feebly  convergent  posteriorly  and  very  slightly  sinuate;  surface 
evenly  convex,  rather  evenly  punctured;  punctures  sub-variolate  and  shal- 
low, wider  than  the  interspaces  which  are  moderately  shining  ;  anterior  and 
jxisterior  margins  ecjual  in  length,  the  former  slightly  the  mor(!  arcuate. 
Elytra  at  base  as  wide  as  th(!  head  ;  sides  very  slightly  divergent  and  arcuate ; 
together  broadly  and  distinctly  emarginate  behind  ;  suture  one-aixth  as  long 
again  as  the  p*  .lotum  ;  surface  strongly  and  evenly  convex,  very  evenly 
punctate  ;  punctures  sub-variolat»!,  shallow,  broa(b'r  than  the  interspaces, 
which  exhibit  a  minutely  granular  texturt!.  Abdominal  segments  decreas- 
ing regularly  and  rather  rapidly  in  width,  lirst  distinctly  narrower  than  the 
contiguous  elytra;  surface  convex,  minutely  granuKte,  finely  j)unctulate; 
border  rather  narrow  ;  transverse  carina  4-cuspid,  cusps  extremely  short, 
rudinu'ntary,  and  expanded  toward  tip.  Legs  dark  bi'ownish-piceous,  mode- 
rate in  lengtli,  joints  of  tarsi  cylindrical ;  lirst  joint  of  posterior  one-half  {is 
long  again  as  the  second,  next  three  uniformly  decreasing  in  length.  Under 
surface  of  the  alxbnuen  minutely  granulate  and  finely  i)unctulate. 

Male. — Surface  of  fifth  ventral  segment  feebly  impi'essed  in  the  middle 
fourth  of  its  posterior  half,  coarsely  ])ubescent,  posterior  edge  broadly  and 
almost  imperc(!ptibly  emarginate;  sixth  segtnent  broadly  truncate  at  tip; 
seventh  bearing  at  apex  two  well-marked  lateral  teeth,  and  upon  each  a  long 
coarse  seta,  longer  than  the  breadth  at  tip. 

Fenuile. — Unknown. 

Length  2.3  mm. 

Detroit,  IMichigtin,  2. 

Tlie  sexual  chanicters  in  tliis  species  are  very  feebly  developed. 


if' 


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i  1 


ill 


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m 

m 


it? 

i  'I  ■ 


90.  S.  rigidlis  n.  sp.--  Form  moderately  robust.  Pubescence  cinereous, 
rather  short,  and  moderately  close,  nearly  uniform  throughout.  Head 
moderate,  more  than  twice  as  wide  fis  long;  interocular  surface  Hat,  two 
and  one-half  times  as  wide  as  the  eye,  evenly  and  rather  closely  punctate  : 
longitutlinal  elevation  rather  prominent,  raised  above  the  general  hn-el  of 
the  eyes  ;  ocular  lines  meeting  at  about  two  lengths  in  advance  ;  antennae 
nearly  black,  coarsely  setose,  rather  sleudtM',  a  little  longer  than  the  width 
of  head,  club  distinct;  third  joint  one-third  as  long  again  as  the  fourth, 
joints  three  to  seven  gradually  decreasing  in  length,  ten  and  eleven  nearly 
equal,  much  thicker  and  longer  than  the  ninth  ;  lirst  joint  of  the  maxillary 
palpi  rtavo-testaceous,  next  two  nearly  black.  Prothorax  thre(!-fourths  as  long 
agaiu  as  the  head,  widest  a  little  before  the  middle  ;  sides  thence  gradually 
convergent  posteriorly  and  very  feebly  sinuate  ;  anttU'ior  and  j>osterior  mar- 
gins equal  in  length,  equally  and  rather  strongly  arcuate ;  length  but  slightly 


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120 


NORTH    AMKKICAN 


gr(\ati'r  than  tlic  width  ;  surface  evenly  convex,  rather  closely  and  somewhat 
unevenly  punctate  ;  interspaces  polisheil.  Elytra  at  base  a  little  wirlitr  than 
the  head  ;  together  liroadly,  evenly,  and  rather  Htron>;ly  eniarginate  ante- 
riorly and  posteriorly  ;  sides  very  nioderatidy  diverj^ent  and  arcuate  ;  humeral 
angles  well  developed  ;  surface  evenly  convex  and  punctate  ;  interspaces 
polished  and  about  equal  in  width  to  the  punctures  ;  suture  one-fourth  as 
lonj^  ajiain  as  the  j)roiiotuni.  Abdominal  segments  decreasin,'  very  gradually 
in  width  posteriorly  ;  margin  rather  riarrow  ;  surface  finely  find  rather  closely 
punctulatu  ;  transverse  carinae  4-cuspid,  intervals  nc^arly  straight,  cusps 
very  short,  obscure  at  tip ;  first  segment  as  wide  as  the  elytra  at  base,  Legs 
rather  stout,  dark  fiisco-piceous,  tarsi  short  ;  first  j<iintof  the  posterior  three- 
fourtlis  as  long  again  as  the  second.  Under  surface  piceous-black  ;  abdomen 
finely  and  closely  punctulate,  clothed  with  long  recumbent  pubescence. 

Mule. — Posterior  edge  of  the  fifth  ventral  segment  almost  inij)erce])tibly 
sinuate;  sixth  segment  broadly  and  very  feebly  sinuate  at  apex,  almost 
transversely  truncate. 

Fiiiuile. — Sixth  segment  broadly  and  somewhat  unevenly  roundtjil  behind, 
being  just  perceptibly  j)roduced  at  tlie  immediate  vertex. 

Length  2.3-2.8  nmi. 

Ciimbridge,  Massacliusetts,  41. 

07.  S.  ilicertus  n.  sp. — Form  moderately  robust.  Pubescence  very 
sparse  and  line,  moderately  long,  pale  llavo-cinereous.  Head  niodeiate, 
slightly  more  than  t.vice  as  wide  as  long  ;  interocular  sur  'ace  very  slightly 
convex,  two  and  one-half  times  as  wide  as  the  eye  ;  souitiwhat  coarsely,  very 
closel;  ,  and  evenly  punctate,  punctures  shallow,  sub-variolate,  and  irregu- 
larly polygonal ;  sulcations  very  slightly  apparent ;  ocular  lines  meeting  at 
two  and  one-half  lengths  in  advance  ;  antennae  rather  slender,  a  little  longer 
than  tlie  width  of  iiead,  fuscous,  basal  joint  darker,  club  distinct  ;  third 
joint  one-third  as  long  again  as  the  fourth,  fourth  and  fifth  equal  in  length, 
sixth  almost  imperceptibly  shorter,  eighth  sub-globular,  joints  of  club  suc- 
cessively and  uniformly  increasing  in  thickness  and  length  ;  first  joint  of  the 
maxillary  palpi  llavo-ttistaceous,  second  and  third  uniform  in  color,  fusco- 
testaceous.  Prothorax  widest  at  the  middle,  where  it  is  very  slightly  wider 
than  the  interocular  surface  and  very  slightly  narrower  than  long;  sides 
thence  very  moderately  convergent  posterif)rly  and  straight ;  anterior  margin 
slightly  longer  and  more  arcuate  than  the  posterior  ;  surface  regularly  ('onviix, 
very  slightly  and  transversely  depressed  just  behind  the  anterior  margin  ; 
very  closely,  rather  evenly,  and  coarsely  punctate;  interspaces  very  narrow. 
Elytra  at  base  as  wide  as  tlu;  head  ;  sides  almost  parallel,  slightly  ami  nearly 
evenly  arcuate  ;  together  very  broadly  and  feebly  tunarginate  jiosteriorly  ; 
suture  nearly  one-fourth  as  long  again  as  the  pronotiim ;  surface  almost 
evenly  convt^x,  rather  coarsely  punctate  ;  punctures  impressed  ;  interspaces 
one-half  as  wide,  shining.  First  three  abdominal  segments  nearly  equal  in 
"width,  and  very  slightly  narrower  than  the  contiguous  elytra ;  border  rather 
narrow ;  surface  convex,  shining,  finely  punctulate  ;  transverse  carinae 
4-cuspid,  cusps  small  and  somewhat  rudimentary.  Under  surface  of  the 
abdomen  dark  piceous-brown,  finely  punctulate,  minutely  granulate.     Legs 


:.r^i 


(n.«if 


>«:>•: 


COLKOPTEUA. 


121 


moderate,  fuscous  ;  first  joint  of  tlu^  i)osterior  tarsi  three-fourths  as  long  'igain 
as  the  second,  second  notably  longer  than  the  third. 

Miih'.. — Unknown. 

h'liiKili'. — Posterior  edge  of  the  sixth  ventral  segment  evenly  rounded,  but 
slightly  produced  in  the  middle. 

LtMigth  2.5  mm. 

Nebraska,  1. 

08.  M.  parallelllS  n. 'sp.  (S<diwar/.  MS.). — F  rin  modi^rately  slender. 
Pubescence  exceedingly  sparse  and  sliort,  almost  invisible,  except  on  the 
heail  and  abdomen,  cinereous.  Head  tnoderate,  scarcely  twice  as  wid(!  as 
long  ;  inten,.  ular  surface  two  and  omvhalf  times  as  wide  as  the  eye  ;  densely, 
ratlier  finely,  and  evenly  punctate;  equally  trilobed  by  the  distinct,  though 
rounded  sulcations  ;  ocular  lines  meeting  at  about  one  length  in  advance; 
antiMinae  slightly  longer  than  tin?  width  of  head,  dark  piceous-black,  club 
mod'M-ate  ;  third  joint  one-third  as  long  again  as  the  fourth,  fourth  and  fifth 
equal,  eighth  globular,  joints  of  cluli  gradu  lly  increasing  in  thickness  and 
length  ;  maxillary  pal]>i  dark  piceons-brown,  very  slightly  paler  toward  the 
base.  Prcthorax  widest  just  before  the  middle,  wln're  it  is  nearly  five-sixths 
as  wide  as  the  head  ;  sides  thence  convergent  jiosteriorly  and  nearly  straight ; 
anterior  and  posterior  margins  equal  in  length,  the  former  much  the  more 
arcuate;  surface  rather  evenly  convex,  closely,  somewhat  irregnlarly,  and 
variolately  punctate  ;  interspaces  seldom  wider  tlian  'he  punctures,  shining  ; 
a  shallow  medial  depression  extends  longitudinally  along  the  middle  half, 
widest  at  the  middle.  Elytra  at  base  as  wide  as  the  head,  sides  slightly  diver- 
gent posteriorly  and  nearly  straight ;  broadly  and  rather  strongly  emarginate 
behind,  and  almost  (jqually  so  at  the  base  ;  suture  scarcely  perceptibly  longer 
than  the  pronotum ;  surface  coarsely,  somewhat  closely  and  unevenly  ])unc- 
tatt^ ;  ])unctures  slightly  variolatt!  ;  inttuspai'es  shining.  First  thre('  abdo- 
minal segments  nearly  equal  in  width,  ami  as  wide  as  the  elytra  ;  border 
modiu'ate  ;  surface  polished,  punctulate,  more  fini-ly  and  closely  so  poste- 
riorly; transverse  carinae  uuicuspid,  cusp  very  slender  and  aciculate.  Legs 
moderate,  dark  castaneous  ;  first  joint  of  th(!  posterior  tarsi  two-thirds  as  long 
again  as  the  second,  second  distinctly  longer  than  the  third.  Under  surface 
of  the  abdomen  finely  and  ratlier  closely  punctulate. 

Male. — Posterior  edge  of  the  fifth  ventral  segment  sinuate,  sinus  feeljle, 
and  one-third  as  wide  as  the  segment,  surface  feebly  impressed  tlu'dUgh 
the  same  width  anteriorly,  "-npression  rather  densely  pilose  ;  sixth  segnient 
sinuate  at  apex,  sinus  nan,  w,  alxuit  twice  as  wide  as  <leep,  surface  convex. 

Ffiiiale. — Sixth  segment  broadly  and  very  evenly  rounded  behind. 

Lengtii  2.7-2.8  mm. 


Lj: 


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P 


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Cambridge,  Massachusetts,  7. 

fl!).  S.  IlOCtivagllS  n.  sp. — Form  moderately  slender.  Pubescence  as 
in  miinlnnun,  but  more  dense.  Head  robust,  scarcely  twice  as  wide  as  long; 
interocular  surface  flat,  twice  as  wide  as  the  eye  ;  coarsely  and  variolately 
punctate ;  interspaces  acute  at  the  sides,  equal  in  width  to  the  punctures 


-  f^ 


'      UBRARY 

^gWTOMOLOQKSAL  BWAMOh 

DEPARTMENT  OF 

AGRICULTURE 


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122 


NORTH    AMEIUCAV 


,       fv 


aloiift  th(!  middle  ;  longitudinal  elevation  broad,  evenly  convex,  prominent ; 
ocular  lines  meeting  at  two  lengths  in  advance;  antennae  sliMider,  somewhat 
longer  than  the  width  of  head,  pieeous-lilack,  clnh  very  slender;  third  joint 
three-fonrths  as  long  again  as  the  fourth,  fourth  and  fifth  sub-equal,  sixth 
and  seventh  snb-e(inal,  shorter.  join.ts  of  club  elongated,  nearly  e(|ua!  in 
length  ;  maxillary  palpi  ilark  fusco-j)i<reous  throughout.  Prothorax  very 
robust,  widest  before  the  middle,  where  it  is  four-fifths  as  wide  as  the  head, 
and  distinctly  wider  than  long;  sides  strongly  arcuate  throughout,  except  at 
the  posterior  margin,  where  they  become  very  feebly  sinuate  ;  anterior  and 
posterior  margins  equal  in  length,  the  foi'uier"  the  more  arcuate;  surface 
evenly  convex  ;  rather  finely,  closely,  anrl  evenly  punctcate  ;  punctures 
ronnil  and  variolate  ;  interspaces  fiat,  one-third  as  wide  as  the  j)unctures, 
moderattdy  shining,  minutely  reticulated  ;  the  canaliculation  is  in  the  form 
of  a  faint  longitudinal  impression,  beginning  just  before  the  middle,  and 
one-half  as  long  as  the  proiiotum.  Elytra  at  base  slightly  narrower  than 
Uw  liead  ;  sides  moderately  divergent  ])osteriorly  and  feebly  arcuate  ;  just 
perceptibly  longer  than  the  width  at  basts  togetber  broadly  and  feebly 
emarginate  behind  ;  suture  one-fifth  as  long  again  .'is  the  pronotum  ;  surface 
feebly  impressed  along  the  suture  ;  rather  finely  and  evenly  punctate  ;  inter- 
sjjaces  generally  one-half  as  wide  as  the  punctur(!S,  shining.  First  three 
abdominal  segments  equal  in  width,  and  as  wide  as  the  contiguous  elytra ; 
border  moderate  ;  surface  feebly  convex,  finely  and  somewhat  closely  piuictu- 
late  ;  transverse  carinae  not  cusped.  Legs  rather  long  and  slender,  piceous- 
black  throughout;  first  joint  of  the  posterior  tarsi  four-fifths  as  long  again  as 
the  second,  second  as  long  as  the  third  and  fourth  together.  Under  surface 
of  abdonum  black  throughout. 

iftilt: — Posterior  edge  of  the  fifth  ventral  segment  sinuate,  sinus  very  short 
and  distint^t,  four  times  as  wide  as  dee]),  apices  very  broad  and  nearly  trans- 
verse ;  surface  contiguous  to  sinus,  fiattened  anteriorly,  but  siarcely  im- 
pressed, its  border  densely  and  coarsely  ciliate ;  sixth  segment  narrow  and 
elongated,  sinuate  at  apex,  sinus  nearly  as  deep  as  wide,  slightly  more  acute 
in  cui'valure  than  the  apices  ;  seventh  very  broadly  and  feebly  emarginate 
at  ai>ex. 

Ftmtile. — Posterior  edge  of  sixth  segment  very  broadly  angulate  at  ai)ex. 

Length  3.3  mm. 

New  Hampshire,  probably  White  iMountains,  2. 

The  description  of  tliis  very  distinct  species  has  been  drawn  from 
the  female,  the  male  beinj;;  in  an  imperfect  condition.  It  has  a 
superficial  resemblance  to  r/ijficifis,  but  the  absence  of  cusps  from  the 
abdominal  carinae,  well  developed  in  the  latter,  will  serve  to  distin- 
giiisii  them. 

100.  S.  lliculeiltus  n.  sp. — Form  very  moderately  robust.  Pubescence 
long,  rather  close,  line,  sub-reoumbent,  cinereous.  Head  moderate,  slightly 
more  than  twice  as  wide  as  long;  interocular  surface  very  feebly  depressed, 
distinctly  more  than  twice  as  wide  as  the  eye;  etjually  trilobed  by  the  very 
feeble  rounded  sulcations  ;  intermediate  surface  nearly  fiat ;  punctures  very 


wmm 


•1! 


COLEOPTERA. 


123 


small,  widi-ly  S(^i)arat('il,  round,  aiul  evonly  distributtMl  ;  iiitt^rspacps  nearly 
Hat;  (iciilar  liiu's  iiuM'tiiig  at  fully  tlirco  K-uf^tlis  in  advanot; ;  first  joint  of 
antennae  black,  second  jiiceous-black  and  more  slender;  first  joint  of  maxil- 
lary ]y.i]\>\  tranriluoent,  pale  i)if'eo-t(^'<taceous,  second  much  darker.  Protho- 
rax  arciiattjly,  evenly,  and  gradually  ineriMsing  in  width  to  a  point  slightly 
in  advaiKuf  of  •the  middh;,  wh«a'e  it  is  distinctly  narrowi^r  than  long,  and 
three-fourths  as  wide  as  tin;  head  ;  sides  thence  moderately  conviM'gent  and 
evenly  sinuate  ;  anterior  margin  slightly  shorter  and  more  arcuate  than  the 
posterior;  surface  m-arly  evtmly  conv(!X,  llnely,  rather  distantly,  and  very 
evenly  punctate;  interspaces  scarcely  as  wide  as  the  punctures,  nearly  Hat, 
highly  polished.  Elytra  at  base  just  perceptibly  narrower  than  the  head; 
siiles  moderately  divergent  posteriorly,  slightly  longer  tiian  the  width  at 
base  and  rather  strongly  arcuate  ;  together  broadly,  evenly,  and  feebly 
em,  "ginate  behind;  suture  one-third  as  long  again  as  the  pronotuni ;  surface 
ratiier  <'onvex,  strongly  and  roundly  impressed  along  the  suture,  and  feebly 
so  ne-'r  the  outer  apical  angles  ;  siitural  impression  rai)idly  widening  toward 
the  bast  ;  punctures  rather  small,  round,  I'eoiily  impressed  and  very  evenly 
distril  iited  ;  interspaces  as  wide  as  tlu^  punctures,  slightly  conv(!X,  and  very 
highly  polished.  First  three  abdominal  segments  ecjual  in  width,  an<l  as 
wide  as  the  contiguous  elytra;  surface  broadly  convex,  finely,  feebly,  and 
evenly  punctulate ;  transverse  carinae  apparently  not  ensped.  Legs  short 
and  slender,  piceous-black,  slightly  paler  beneath  ;  first  joint  of  the  posterior 
tarsi  scarcely  one-fourth  as  long  again  as  the  second,  second  distinctly  longcM- 
than  the  third,  fourth  narrow  and  very  obliijui',  fifth  longer  tlian  the  first, 
very  narrow  at  the  base,  and  widest  near  the  distal  extremity. 

Mali'. — I'nknown. 

FiiiKilf. — Sixth  ventral  segment  very  broad  and  viM'y  broadly  rounded  be- 
hind, transversely  truncated  through  a  small  extent  at  the  immediate  apex. 

Length  2.8  mm. 

Stockton,  Calif'orniii,  1. 

Tiic  iiiiteniiac  are  missing,  with  exception  of  the  first  two  joints; 
also  tli«;  third  joint  ot"  tlie  maxillary  palpi. 

101.  S.  juvencus  n.  sp. — Form  rather  slender.  Pubescence  long,  sub- 
recumbent,  close,  rather  coarse,  prominent,  pale  fulvo-cinereous,  very  dense 
on  the  abdomen.  Head  moderate,  twice  as  wide  as  long;  interocular  surface 
flat,  twice  as  wide  as  the  eye,  evenly,  rather  finely,  and  somewhat  distantly 
punctate;  longitudinal  elevation  narrower  than  the  lateral  portions,  feebly 
and  evenly  convex,  crest  broadly  impunctate ;  interspaces  very  highly 
polished;  eyes  small,  very  convex,  clothed  thickly  with  rather  long,  erect 
setae;  ocular  lines  meeting  at  somewhat  more  than  one  length  in  advance; 
antennae  as  long  as  the  width  of  head,  rather  slender,  club  distinct,  piceous- 
brown  ;  third  joint  one-third  as  long  again  as  the  fourth,  fourth  slightly 
longiT  than  tlu;  fifth,  sixth  and  seventh  eijual  and  abruptly  shorter,  eighth 
very  slightly  elongated,  ninth  as  wide  as  long,  much  smaller  than  the  tenth, 
tenth  and  eleventh  equal  in  width,  the  latter  slightly  the  longer,  and  obtuse 
at  ti]>;  maxillary  palpi  moderate,  pale  piceous-brown,  first  joint  i)aler  and 
testaceous.     Pnthorax  widest  at  the  middle,  where  it  is  four-fifths  as  wide 


t    J  •I 

fftiil 

iil 


Mti 


■M 


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124 


NORTH    AMKUICAN 


as  the  lii'ail,  anil  slightly  narrower  than  long  ;  sides  thence  almost  equally 
convergent  anteriorly  ainl  posteriorly,  slightly  arcuate  in  the  former,  and 
feehly  sinuate  in  the  latter  direction  ;  anterior  margin  very  sliglitly  longer 
and  more  arcuate  than  the  posterior  ;  surface  very  evenly  convex,  rather 
finely,  distantly,  and  evenly  punctata  ;  i)nnctures  rounded  and  deeply  im- 
pressed ;  interspaces  feehly  convex  and  very  highly  polished.  Elytra  at 
base  distinctly  narrower  than  the  head  ;  sides  rather  strongly  divergent 
])osteriorly,  much  longer  than  the  width  at  hase,  and  feehly  arcuati^  much 
more  strongly  so  toward  the  apices,  almost  straight  near  the  hase  ;  together 
broadly,  roundly,  and  very  feehly  emarginate  behind  ;  suture  from  one-fourth 
to  one-fifth  as  long  again  as  the  proiiotnm  ;  sui'face  rather  dejjressed,  very 
even  ;  finely,  vrry  distantly,  an<l  rathi-r  evenly  punctate  ;  punctures  ini- 
])ressed  ;  interspaces  very  feelily  convex  and  Ixaving  an  extremely  liigli  polish. 
First  two  ahdominal  segments  equal  in  width,  and  as  wide  as  the  contiguous 
elytra,  the  remainder  decreasing  uniforndy  and  very  grailually  in  width  ; 
snrfacre  very  broadly  convex,  highly  jiolished,  coarsely,  evenly,  and  distantly 
punctulat(! ;  transverse  carinae  not  cusped.  Legs  rather  long  and  slender, 
dark  rufo-piceous  above,  paler  lu'in^ath  ;  first  joint  of  the  posterior  tarsi 
three-fifths  as  long  again  as  the  second,  slightly  longer  than  the  fifth,  second 
slightly  longer  than  the  third,  fourth  much  shorter,  fifth  very  narrow  at  the 
base,  becoming  very  thick  at  tip. 

Mdh'. — Fifth  ventral  segment  not  appreciably  modified  ;  sixth  broadly  and 
transversely  truncrte  at  apex,  truncation  rounded  at  the  sides,  and  giving  a 
mere  suspicion  of  sinuosity  in  the  nuddle. 

Feiiiiili', — Unknown. 

Length  2.1  mm. 

Detroit,  Miciiigan,  1. 

Tlie  sexual  cliaructers  are  extremely  feeble  ;  the  species  is  other- 
wise well  mark<Hl. 


102.  S.  paiipercilllis  n.  sp. — Form  moderately  slender.  Pubescence 
long,  clos<',  rather  coarse,  semi-ert^ct,  and  very  pale  tlavo-cint>reous,  j)ronii- 
nent.  Head  moderate,  rather  more  than  twice  as  wide  as  long  ;  iuti-rocular 
surface  nearly  Hat,  twice  as  wide  as  the  eye ;  punctures  rather  small,  deep, 
close,  evenly  distributed,  and  irregularly  polygonal,  somewhat  confiuent 
anteriorly;  interspaces  narrow,  very  convex,  and  highly  polisheil ;  longitu- 
dinal elevation  somewhat  narrower  than  the  lateral  portions,  rather  acutely 
ridged  ;  ocular  lines  nuieting  at  about  two  lengths  in  advance  ;  first  two 
joints  of  antennae  piceous-brown,  sub-<Hiual :  eyes  rather  short,  very  convex, 
clothed  with  very  short,  erect  setae  ;  maxillary  palpi  rather  short,  last  joint 
strongly  clavate,  pale  piceo-testaceons  throughout.  Prothorax  arcuately  and 
rather  rapidly  widening  to  a  point  nearly  three-fourths  the  length  posteriorly, 
where  it  is  three-fourths  as  wide  as  the  head  and  distinctly  narrower  than 
long ;  sides  thence  moderately  convergent  and  sinuate  ;  anterior  margin  much 
shorter  and  more  arcuate  than  the  posterior  ;  surface  nearly  evenly  convex, 
with  an  extremely  feeble  tuberculiform  swelling  near  each  basal  angle, 
and  a  very  feeble  transverse  impression  just  behind  the  anterior  margin  ; 
rather  coarsely,  closely,  and  evenly  punctate ;  interspaces  narrow,  convex, 


COLEOPTEKA. 


12") 


anil  liiglily  polisliiMl.  Elytra  at  l)fiso  slightly  iiarrowt-r  than  tin'  head  ;  h'uU'm 
fei'hly  divergent  posteriorly,  much  longer  than  the  width  at  base,  very  f'eehly 
arcuate,  most  strDnjjly  so  posterioily  ;  toirether  hroailly,  roundly,  and  mode- 
rately eiiiarginate  \iehind  ;  suture  rather  more  than  one-fourth  as  long  again 
as  the  pronotum ;  surface  very  f(!ehly  imjiresaed  along  the  suture,  more 
strongly  so  toward  the  hase  ;  rather  finely,  moderately  closely,  and  evenly 
liunctnte;  punctures  round  and  impressed,  clo^^ely  crowded  and  ]iolyg(Uial 
near  tlie  inner  basal  angles  and  along  the  suture,  but  apparently  never 
coalescent.  AbJominal  segments  decreasing  uniformly  and  somewhat  rapiilly 
in  width,  first  distinctly  narrower  than  the  contiguous  elytra  ;  surfact^  rather 
convex,  coarsely,  and  I'atiier  closely  ])unctulate,  becoming  mor(?  finely  so 
toward  the  tip;  apices  of  the  segments  impunctat(! ;  transverse  carinao  not 
CHsped.  Legs  rather  long,  dark  fuscous  above,  much  paler  fusco-testaceous 
beneath,  femora  stout;  first  joint  of  tlie  jiosterior  tarsi  two-thirds  as  long 
again  as  tlie  second,  distinctly  sliorter  tiian  tiie  fiftli,  second  much  longer 
than  the  third,  third  slightly  longer  than  tlie  fourth,  fifth  slightly  narrower 
at  the  base  than  at  the  apex. 

Mule. — Fifth  ventral  segment  not  appreciably  moilified  ;  sixtii  very  broadly 
sinuate  at  apex,  sinus  occupying  nearly  the  entire  apical  width,  evenly 
rouiiiled  throughout,  from  ten  to  twelve  times  as  wide  as  deep  ;  seventh  very 
broad  at  ai)ex,  where  it  is  moderately  euiarginate,  bottom  of  emargiiiatiou 
transverse. 

FiinaJe. — Unknown. 

Length  2.2  mm. 

Lociility  uncertain. 

The  iintenniie  are  missing.  Tlic  species  is  quite  di.stinct  and  is 
probably  from  Michigan. 

103.  S.  liaplliS  n.  sp. — Form  slender.  Pubescence  short,  sparse,  and 
moderately  coarse,  pale  flavo-cinereous  on  the  head,  pronotum,  and  elytra, 
shorter,  more  recumbent,  and  cinereous  on  the  abdomen.  Head  moderate, 
twice  as  wide  as  long  ;  interocular  surface  flat,  nearly  two  and  one-half  times 
as  wide  as  the  eye  ;  closely  and  rather  coarsely  punctate  ;  sulcations  scarcely 
visiblt! ;  punctures  sub-variolate  ;  antennae  about  equal  in  length  to  the 
width  of  head,  rather  slender,  dark  blackish-piceous,  coarsely  setose,  club 
moderate  or  small ;  third  joint  one-fourth  as  long  again  as  the  fourth,  joints 
three  to  six  uniformly  and  grjidually  decreasing  in  length,  last  two  joints 
much  larg.'r  than  the  ninth,  equal  in  thickness,  eleventh  acuminate  at  tip. 
Prothorax  widest  just  behind  the  middle,  where  it  is  notably  wider  than  the 
interocular  surface,  and  slightly  narrower  than  hnig  ;  sides  thence  moderately 
convergent  posteriorly  and  strongly  siiiuati-;  anterior  and  posterior  margins 
equal  ill  length,  e<iually  though  feelily  arcuate :  surface  evenly  convex, 
closely  and  evenly  punctatt;;  punctures  small,  regul'ar,  and  somewhat  vario- 
late ;  interspaces  one-half  as  wi<le  as  the  punctures,  polished.  Elytra  at  base 
just  ])erceptibly  narrower  than  the  head  ;  sides  but  very  slightly  divergent 
posteriorly,  straight  in  the  middle  three-fourths  ;  together  broadly  and  feebly 
emarginate  behind  ;  suture  one-sixth  as  long  again  as  the  pronotum;  surface 
atlier  evenjy  convex  and  evenly  punctate  ;   punctures  similar  to  those  of 


■1  1 


Wr. 


\U, 


m 


126 


NORTH    AMEHICAN 


tlin  jii'oiKitum;  iiitcrspnces  ('(iiial  to  tlii'iii  in  wiiltli,  jiolisln'il.  Abdominal 
scfjiiiiMits  ii('('i't'asin)i  n-gularly  iuid  very  f,rmlii!illy  in  widlii,  lli-st  as  wiiii'  as 
tilt'  contigiions  elytra  ;  bordisr  proniiniMit ;  surface  convex,  jiolislieil,  finely 
punctulnte  ;  transverse  earinae  not  cnsped.  Legs  dark  brownish-blaek, 
moderate  in  length  ;  lirst  joint  of  tlie  jjosterior  tarsi  one-lialf  as  long  again  an 
the  second.  lln<ler  surl'ace  of  the  ulxlonien  shining,  wry  finely  gniniilate, 
finely  and  somewhat  distantly  piinctulate. 

Mull', — Unknown. 

Fmuili;. — Sixth  ventral  segment  evenly  rounded  behind. 

Length  II. 9  mm. 

t 
Detroit,  Micliigiiii,  2. 


104.  §,  eilOdis  n.  sp. — Form  moderately  slender.  Puheseence  rather 
long,  recumbent,  cinereous,  quite  close  and  evenly  distributed.  Head  mode- 
r.'ite,  twice  as  wide  as  long;  interocular  surface  nearly  flat,  rather  closely 
and  finely  j)unctate,  two  and  one-half  times  as  wide  as  th(^  eye?;  longituilinal 
elevation  obsolete  ;  ocular  linea  meeting  at  two  lengths  in  advance  ;  antennae 
piceous-bla(;k,  (Uiual  in  length  to  the  width  of  head,  slender,  club  distinct; 
thinl  joint  ('(jual  in  length  to  the  fourth,  last  two  joints  e(jnal  in  size,  ninth 
much  smaller;  first  joint  of  maxillary  palpi  testaceous,  second  and  third  black. 
Prothorax  widest  at  the  middle,  where  it  is  four-fifths  as  wi<le  as  the  head  ; 
sides  thence  convergent  posteriorly  and  sinuate;  very  slightly  longer  than 
wide  ;  anterior  and  posterior  margins  e(iual  ;  surface  evenly  convex  and  finely 
punctate  ;  interspaces  generally  narrower  than  the  i)unctures,  shining. 
Elytra  at  base  nearly  as  wide  as  the  head  ;  sides  feebly  divergent  posteriorly 
and  slightly  arcuate;  together  broadly  and  feebly  emarginate  behind,  more 
strongly  .so  at  the  base ;  suture  one-eighth  as  long  again  as  the  pronotum  ;  sur- 
face evenly  convex,  with  the  exception  of  a  scarcely  perceptible  depression 
along  tlu!  suture;  rather  finely  ininctate  ;  punctures  shallow;  interspaces 
narrower  anteriorly,  and  broader  posteriorly  than  the  width  of  the  punctures, 
shining.  First  four  abdominal  segments  of  equal  width,  and  as  wide  as  the 
elytra:  border  very  broad  ;  surface  shining,  finely  and  rather  closely  punc- 
tulate  ;  transverse  carinae  not  cusped.  Legs  dark  blackish-piceous,  rather 
slender,  tarsi  moderately  robust;  first  joint  of  posterior  three-fourths  as  long 
again  as  the  second,  second  scarcely  perceptibly  longer  than  the  third.  Under 
surface  of  abdomen  very  finely  and  closely  punctulate. 

Mule. — Unknown. 

Feiiiiilc. — Posterior  edge  of  the  sixth  ventral  segment  broadly  and  evenly 
rounded  behind. 

Length  2.8  mm. 

Veta  Pass,  Colorado,  1. 

I  found  this  s[)ecips  labeled  S.  mon'o  Grav.,  but  as  it  differs  in 
several  important  particulars  Iron)  tiuxt  species,  as  described  by 
Kraatz — notably  in  the  structure  of  the  antennae  and  tarsi — 1  have 
concluded  to  describe  it  as  new. 


COLKOPTKUA. 


127 


llTf.  S.  (lives  n.  sp. — Form  ratlu'f  robust.  I'lilicHceiict!  somcwliat  loii;^, 
Hub-rccunild'iit,  conrse,  close,  cineroniis,  and  soniewliat  coimpiouous.  Head 
small,  roliiist,  distinctly  li'ss  tlian  twici'  as  widt"  as  lonj,'  ;  intcrofular  siirfaci! 
broadly  an<l  t'cobly  dcprcsscil,  two  and  oni  lialf  times  as  wide  as  the  cyo  ; 
tMiually  trilobed  by  tho  \  cry  feeblo,  roundod  Hubsttions  ;  intcrnuMliatc  siirfauo 
evenly  and  very  feebly  convex  ;  punctures  very  cbise,  round,  and  evenly  dis- 
tributed ;  antennae  soinewliat  longer  tban  tbe  widtli  of  iiead,  ratlier  rohust, 
coarsely  and  sparsely  setose,  dark  piceons-brown,  basal  joint  black  and  dis- 
tinctly more  robust  tban  tbe  second,  club  distinct ;  tbird  joint  one-tliird  as 
long  again  as  tlie  fourtb,  foiutli  and  liftii  eijual,  sixtli  somewbat  slnuter  tlian 
the  seventh,  sub-eiiual  in  thickness,  eighth  as  robust  as  the  seventh,  nearly 
twice  as  long  as  wi<le,  joints  of  club  increasing  nniforndy  an<l  very  gradually 
in  length  and  thickness  ;  maxillary  palpi  rather  slender,  piceous-black,  basal 
joint  ]>iceo-testaceous.  Prothorax  arcuately,  (n-enly,  and  vi'vy  gra<lually 
widening  to  tbe  middle,  where  it  is  more  than  live-sixths  as  wide  as  tho 
head,  and  distinctly  narrower  than  long;  sides  thence  moderately  conver- 
gent and  ratlier  fe(d)ly  sinuate  ;  anteriiw  margin  longer  and  more  arcuate 
than  the  posterior;  surface  evenly  convex,  fundy  ami  evenly  punctate; 
interspaces  nearly  as  wide  as  the  punctures,  nearly  Hat,  highly  ]>olished. 
Elytra  at  base  as  widt>  as  the  head  ;  sides  rather  feidily  divergent  posteriorly, 
much  longer  than  the  width  at  base,  and  somewbat  feebly  arcuate,  most 
strongly  so  posteriorly  ;  together  broadly  and  very  feebly  emarginate  behind  ; 
suture  one-fourth  as  long  again  as  the  ])ronotum  ;  surfa(!e  lincdy,  feebly,  and 
evenly  punctate  ;  interspaces  much  narrower  toward  the  base,  generally  fi'cbly 
convex  and  highly  polished.  Abdominal  segments  decreasing  nniforndy  and 
very  gradually  in  width,  first  nearly  as  wide  as  the  contiguous  elytra  ;  surface 
very  finely,  somewhat  closely  and  evenly  jmnctulate  ;  transveise  carinae  not 
cusped.  Legs  moderate,  piceons-black  throughout ;  li:'st  joint  of  the  poste- 
rior tarsi  one-half  as  long  again  as  the  second,  much  shorter  tban  the  tifth, 
joints  two  to  four  uniformly  and  rapidly  decreasing  in  length.     Hody  winged. 

^f(tll'. — Posterior  edge  of  the  fifth  ventral  segnunit  feebly  emarginate  in  its 
middle  third,  emargination  (evenly  rounded  and  sciHOt-ly  measurable,  con- 
tiguous surface  very  feebly  Hatteninl ;  sixth  sinuate  at  apex,  sinus  narrower 
and  much  more  acutely  rounded  than  tbe  apices,  sides  m^irly  straight, 
slightly  more  than  three  times  as  wide  as  deep  ;  seventh  segment  trans- 
versely truncate  at  tip. 

Juiiiale. — I'nknown. 

Length  ;i.]  nmi. 

Nortliern  California,  1. 

10(t.  S.  SUbgriHeilS  n.  sp.  (Schwarz  MS.). — Form  rather  slender,  sides 
parallel.  Pubescence  sligiilly  more  plentiful  on  the  head  and  elytra,  through- 
out rather  long,  tlavc  cinereous  in  color.  Head  moderate,  a  little  more  than 
twice  as  wide  as  long  ;  interocular  surface  nearly  Hat,  rather  coarsely  punc- 
tate ;  punctures  distinct  and  setigerons  ;  longitudinal  elevation  broad  and 
scarcely  visible ;  ocular  lines  meeting  at  one  length  in  advance  ;  antennae 
short,  equal  in  length  to  the  width  of  head,  third  joint  one-third  as  long 
again  as  the  fourth,  joints  four  and  five  of  equal  length,  club  well  developed. 


,t,. 


'•Us 


'in 


€ 


I 


T^ 


128 


'NOKTII    AMKUICAN 


ti'iitli  aiifl  oli'vcTith  jdintrt  loiii^cr  anil  tliirki'i-  tliaii  tlic  ninth,  I'qnal,  of  a  dark 
fuscous  tint  ;  lirst  joint  of  tlm  maxillary  palpi  dark  llavo-ti'staccous,  second 
and  third  dark  hlackish-fuscous.     Prothorax  short  and  rohust,  three-fourths 


>ng  again  a 


in  as  tliK  head, 


di'st   h 


till'  iniildii',  whi-ri'  it  is  ncarlv  as 


widf  as  long  ;  sides  tlienee  eouverging  vory  gradually  and  very  fetdily  sinuate  ; 
posterior  margin  slightly  narrower  and  more  areuattf  than  the  anterior  ;  sur- 
face evenly  convex,  rather  finely  |>unctate;  interspaces  ahout  eipial  in  width 
to  the  ininctures.  Elytra  at  liase  eijual  in  width  to  tlie  head  ;  together  rather 
deeply  einarginato  at  the  hase,  very  broadly  and  feebly  so  behind  ;  sides  hut 
slightly  divergent,  arcuate;  suture  onelltih  as  long  again  as  tlie  pronotuiii  ; 
surl'aei'  rather  convex  ;  punctures  ratlicr  tine,  ini|iressed,  setigeroiis  ;  inter- 
spaces slightly  greater  than  the  width  of  the  punctures,  highly  polished. 
Abdominal  segnii-nts  decreasing  vi-ry  giailually  in  width,  lirst  almost  as  wide 
as  the  elytra:  surface  vi'vy  sparsely  and  linely  punctate,  shining;  border  of 
lirst  four  segments  moderate  ;  transverse  cirinae  not  euspinl.  Legs  [liceous- 
black,  tarsi  a  little  paler,  rather  robust;  lirst  joint  of  the  posterior  one-half 
as  long  agi'.in  as  the  second.  Under  surface  black,  abdomen  very  finely  and 
rather  closely  iiunctati-. 

^/tll,t. — Posterior  edge  of  the  tilth  ventral   segment   very  feebly   sinuate, 
sinus  one-third  as  wide  as  the  segment,  surface  evenly  convex  ;  sixth  sinuate 


at  apex,  sinus  o 


lie-half  as  wide  as   the  segment,  twici 


e  as  wiile  as  deep 


tiguous  surface  feebly  and  longitudinally  impressed. 


Female. — Sixth  segment  broadly  and  evenly  rounded  behind. 
Length  2.8  mm. 

Calit'orniii,  1  ;   IJritisli  Columbia,  li"». 


lt'7.  S.  teri'icola  n.  sp. — Form  rather  rohust.  Puhescence  erect,  rather 
short,  line,  moderately  abundant,  cinereous.  Head  scarcely  twice  as  wide  as 
long;  interocular  surface  a  little  more  than  twice  as  wide  as  the  eye;  nearly 
flat,  very  closely,  finely,  and  regularly  punctate  ;  punctures  variolate  ;  nearly 
e(i\ially  trilobed  by  the  shallow  sulcations  ;  ocular  lines  meeting  at  nearly 
three  lengths  in  advance;  antennae  slender,  dark  reddish-black,  coarsely 
setose,  third  joint  one-third  as  long  again  as  the  fourth,  joints  four  and  live 
equal  in  length  ;  tirst  joint  of  maxillary  palpi  dark  testaceous,  second  and 
third  black.  Prothorax  widest  slightly  before  th6  middle,  where  it  is  live- 
sixths  as  wide  as  the  head,  and  almost  as  wide  as  long  ;  sides  thence  con- 
vergent posteriorly  and  straight;  posterior  margin  slightly  shorter  than  the 
anterior  ;  equally,  feebly  arcuate  ;  surface  evenly  convex,  closely,  somewhat 
evenly  and  finely  punctate;  j)unctures  sub-variolate;  interspaces  narrower, 
moderately  lustrous.  Elytra  at  hasi'  wider  than  the  head  ;  sides  almost  im- 
perceptibly divergent  posteriorly,  and  very  slightly  arcuate  ;  together  broadly 
emarginate  anteriorly,  and  vvvy  broadly  and  more  strongly  so  posteriorly  ; 
sutur*!  nearly  ont!-fourth  as  long  again  as  the  pronotum  ;  surface  evenly  con- 
vex, rather  evenly  and  linely  punctate ;  punctures  feebly  impressed,  some- 
what wider  than  the  interspaces,  which  are  lustrous.  First  three  abdominal 
segments  as  wide  as  the  elytra  at  base;  border  strong;  surface  rather  Hat, 
and  very  linely  j)unctulate  ;  transverse  carinae  not  cusped.  Legs  modt^rate 
and  rather  slender,  piceous-black  ;  first  joint  of  the  posterior  tarsi  two-thirds 


it 


COLKOl'TKUA. 


120 


ns  loll;;  a;,'niii  ns  tlic  sccoiul,  sccfuiil  iiiiicli  ImifiiT  tluni  tlic  third.  UikIit 
Murfnco  of  tlid  aliiliiini'n  sliiiiing  ami  somcwliat  iimri)  (joarscly  iimirtiilatc 
tliaii  t)i(t  u|)])('r, 

Miilr. — I'ostt'rior  0(1^0  of  tho  nixtli  ventral  scgnu'iit  Hiiiuatt<,  siiuis  oxft't-il- 
iii^'ly  fiH(l)lH,  one-third  as  wido  nH  tliH  Hfgiiiciit. 

FeiiKilr. — IJllkllowil. 

I.i'li^'th  'J.tl  uilii. 

Iiiii\(^  'I'lilioe,  Neviulii,  1. 

The  iuiteniml  dubs  im;  inissiti},'  in  (lio  only  known  specinion. 

Itis.  S.  .:lllli«lllllis  II.  sp. — Form  moderately  rohiist.  Piibcsuciu't'  rathor 
short,  cinereous,  more  abundant  on  the  head  and  elytra.  Head  small,  three- 
fourths  as  wide  a^'ain  as  long;  interocular  surface  very  moilerately  excavated, 
strouijly  l)isulcat<',  three  times  as  wi(h^  as  the  eye;  llnely  and  variolately 
punctate;  interspaces  wider  than  tlie  punotures,  shiniuj;;  longitudinal  ele- 
vation as  wido  as  the  eye;  ocular  limis  meeting  at  o\u\  length  in  advance  ; 
antennae!  longer  than  the  width  of  head,  piceous-hlack,  rjither  slemler,  clul) 
large  ;  third  joint  twice  as  long  as  the  fourth,  fourth  and  fifth  e(iual,  sixth 
and  seventh  e(iual,  much  shorter,  eighth  almost  globular,  joints  of  club  very 
gradually  increasing  in  length,  teiitli  slightly  thickest  ;  palpi  and  lU-al  organs 
entirely  piceous-black.  Prothorax  very  robust,  widest  a  little  hel'ore  the 
middle,  whert^  it  is  four-lifths  as  widi;  as  the  head  ;  sides  thenuo  convergent 
posteriorly  and  slightly  sinuate;  surface  with  a  broad  transverse  impression 
just  behind  the  anti'rior  margin,  and  a  ratlier  deep  (ibli(iue  iini)ressiou  on 
each  side  near  the  middle  ;  vei'y  I'-iely  punctate  ;  punctures  very  shallow  and 
variolate;  interspaces  wider  than  tlie  punctures,  shining;  anterior  margin 
slightly  longer  than  the  posterior.  151ytra  at  base  hroadly  and  rather  deeiily 
emnrginate,  slightly  wi<ler  than  tin;  head  ;  together  broadly  and  just  jiercep- 
tibly  eniarginate  posteriorly  ;  suture  one-lifth  as  long  again  as  the  pronotuiu  ; 
si(b'S  very  slightly  divergent  ]iosteriorly  and  moderately  arcuate  ;  surface  of 
each  with  a  broad,  irregular,  and  longitudinal  elevation  along  the  middle, 
punctate  like  the  pronotnni.  Abdominal  segments  decreasing  rather  rapiilly 
in  width,  first  as  wide  as  the  contiguous  tdytra  ;  border  very  strong  ;  surface 
shinirig  and  very  finely  punctate  ;  transverse  carinae  not  cusped.  Under  sur- 
face of  the  abdomen  very  finely  and  rather  closely  punctate.  Legs  Idack, 
rathi'r  long  and  slender  ;  first  joint  of  the  posterior  tarsi  twice  as  long  as  the 
second. 

Mule. — Posterior  edge  of  the  sixth  ventral  segment  very  broadly  sinuate, 
sinus  evenly  rounded,  about  one-fifth  as  deep  as  wide. 

female. — Sixth  segment  very  broadly  and  triangularly  produced,  surface 
densely  liirsute. 

Length  3.7-4.1  mm. 

Thurston  County,  Washington  Territory,  2. 

109.  S.  tuberculatlis  n.  sp. — Form  rather  slender.    Pubescence  very 
long,  somewhat  dense  over  the  entire  surface,  pale  fuscous  in  color,  erect. 
Head  moderate,  twice  as  wide  as  long ;  interocular  surface  nearly  flat,  three 
Stenini.  9 


■ 


(  .V' 


?:rf' 


it 

m: 


180 


NORTH    AMRHICAN 


timcH  IIS  wide  ha  tlio  eye;  dfoply,  coftrnely,  niul  rntlicr  doHt'ly  piiiictntt' ; 
l()ii>;ituiliiial  clcvatiDii  very  iinnniiH'iit ;  ftuti'iiiiiir  slfiiclcr,  ('(iidiI  in  Iciijitli 
to  till'  width  <pf  lifiid,  unit'iiniily  fii^co-tcMtiU'i'uiis,  riiili  wi'il  dcvt'li)i>i'd  ;  tliird 
joint  but  vi'ry  xliKlitly  Idngt-r  tlinn  tliK  fourth  ;  joints  of  (dub  griidniilly  in- 
cn-asinj;  in  hMi^tii  and  tliickncMn,  lant  j<.int  acuniinafoat  tip;  <Mitirc  antfuna 
bristling;  witli  lon^'  sctai- ;  t-yi-s  coarjudy  Hctoso  ;  paljii  iniil'i)rinly  llavo-tfsta- 
ceouB.  Prothorax  widi'Ht  just  bfl'orc  tin-  niiddlo  ;  sitlcs  tlitMU'o  tiKidcratidy 
convcrfjiMit  posteriorly  and  ffidily  sinuate  ;  length  Hlij;htly  greater  than  llie 
breadth  ;  anterior  and  posterior  nuuxins  ei|nal  and  arcuate;  surface  coarsely 
and  iiref;ularly  punctate  and  tutierculjite  ;  interspaces  jxdished.  Elytra  at 
base  very  .••li^jhtly  n.'irrower  than  the  head  ;  sides  very  moderately  divei'j,'ent 
posteriorly  and  arcunto  ;  to>;etlier  broadly  and  very  fenbly  omarginato  behind  ; 
Huture  one-liftli  as  loiif;  aj;ain  as  the  pronotuni ;  surface  coarsely  and  irregu- 
larly puni'tate ;  punctures  impressed;  iiitersiiaces  hif,'hly  iiolished  ;  on  each 
elytron  there  are  threts  tuberculiforui  tdcvations.  Abdominal  sugmnntfl 
(b'creasing  very  moderately  in  width,  first  nearly  as  wide  as  the  adjoining 
elytra;  border  prominent;  surface  shining  and  rather  coarsely  punctate, 
tranH"HrHe  carinat!  not  cusped.  Legs  short,  fusco-testaueous,  hirsute  ;  tarsi 
very  jiale  in  cnlor  ;  first  joint  of  the  posterior  efjual  in  ItMigtli  to  twice  the 
second,  second  e(|ual  to  the  third.  I'mU'r  surface  of  the  ahdoiucn  lilackish- 
piceous,  coarsely  and  distantly  punctate,  bristling  with  long  erect  setae. 

Mule. — Posterior  edge  of  the  sixth  ventral  segnusnt  broadly  and  trans- 
versely truncate  ;  seventh  deeply  emai'ginati^  at  apex. 

Fiiiitilr. — Sixth  segnu'iit  broadly  and  triangularly  produced  posteriorly, 
with  the  apex  rounded. 

Length  2.3-2.G  mm. 

Florida;  Siiiul  Point,  "> ;  Enterprise,  1. 

Tliis  sjHiL'ies  niuy  be  very  readily  recognized  by  tiie  irregularities 
of  the  siirtace,  there  being  ten  very  apj)arent  tubereiilations — tour  on 
the  pronotinn  and  six  on  the  elytra — as  well  as  by  its  very  bristling 
and  hirsute  a|)i)earance. 


110.  S,  ilidistiliclus  n.  sp,  (Sclnvarz  MS.). — Form  moderately  slender. 
Pubearenc(t  rather  short  and  close,  ciner(!ous  in  color  throughout.  Head 
moderate,  twice  as  wide  as  long  ;  interooilar  surface  about  two  and  one-half 
times  as  wide  as  the  eye,  very  feebly  excavated  and  closely  punctate  ;  jmnc- 
ture«  variolate  ;  longitudinal  elevation  scarcely  evident;  ocular  lines  meeting 
at  one  and  oi>(!-half  lengths  in  advance;  antennae  nearly  black,  modi^'ately 
robust  and  rather  linely  setose,  club  moderate,  third  joint  one-third  as  long 
again  as  the  fourth,  joints  of  club  gradually  increasing  in  thickness  and 
length;  maxillary  palpi  reddish-brown,  first  joint  a  little  paler.  Prothorax 
widest  at  one-third  its  length  from  the  anterior  margin,  where  it  is  four-fifths 
as  wide  as  the  head  ;  sides  tlionce  rather  rapidly  convergent  and  almost 
straight  ;  length  one-fifth  greater  than  the  breadth  ;  anterior  margin  slightly 
longer  than  the  posterior,  equally  arcuate;  surface  very  slightly  and  trans- 
versely impressed  near  the  anterior  and  posterior  margins,  very  closely 
punctate ;  punctures  variolately  impressed  ;  interspaces  narrower  than  the 


',« 


COLEorTEIlA. 


181 


piuictnrcs,  Hliininfj.  Elytra  nt  Iimhv  somcwluvt  nnrrowvr  tlian  thf  li<a<l ; 
tdjfctlMT  ili'<'|il_v  <'iii;irj,'in;itf  at  tin-  ha^"',  hroa'lly  aii<l  niori'  ffclily  ho  ipostc- 
ricirly  ;  mIcIcm  ratlii-r  Mtniii;;ly  iliv('r>;<'iit,  an-iiatu  ;  Hutiirc  oiu- i'ij;litli  a.s  loiii^ 
again  tin  tlic  prnnutiun  ;  Hurfaco  convex,  iinpnvstxl  along  tliu  sutuiv,  .-vcnly 
{Mnu-tnti' ;  l)un(tiir<'rt  iiiiprfSHcd  ;  intci'.x|>a('<'.-i  alioiit  <'<|iial  in  ui<ltli  to  tlm 
Iiinicttires.  First  lour  •alxloiiiiiial  Hi'<;ni<'nls  <'<iiia'  in  wi<itii,  a.>*  wi<l«>  as  tin* 
(^onti^'UouH  clytia  ;  iKirdcr  \v<'il  luarkoil  ;  Hurfaro  Monicwhat  clo8«'ly  and  very 
finely  ]iiin('tiilati',  MJiiniii^';  transversa  carinao  not  cnsiicd.  Legs  ratlior 
slciidci',  {tii't'otis-lilHi'lv ;  lirst  joint  of  tliu  posterior  tart*i  e<jiiai  in  leii^tii  to 
twice  tliu  seoond.     Under  Kiirfaet?  Idack,  sliining. 

Mull'. — I'osterior  ed<,'e  of  the  liltli  ventral  segment  very  liroailly  ttn<l  leeldy 
sinuate;  sixth  liroadly  sinuate  at  a|)<'\-,  dejitli  of  sinus  e<|inil  to  oiie-tliinl  itd 
width,  ratlier  acutely  roumled  at  tin*  lioltoni. 

/'(•/«(//(. — .Sixth  scgHiont  Inoadly  aJid  evenly  roun<led  behind. 

Li'n;,'tli  2.(J-2.!)  mm. 

Detroit,  Mic'liigati,  1;'». 

This  species  gieatly  rcseniMes  svhi/rispiis,  from  wliieli  it  difli-rs  in 
tin'  luitiire  innl  [xinetiinlidn  of  (lie  interfu'iilar  surfiu-c,  iimi  notnlily  in 
tin;  .structure  of  the  pidtlioriix,  the  trausv<Tse  depre.ssion  in  liie  .sur- 
face just  behind  tiie  anterior  niar<;in  heinj;;  entirely  ah.sent  in  siihyrl- 
sens,  and  the  punctuation  being  much  more  distant  and  les.s  varioiatfi 
in  tlie  latter;  tiie  lenjitii  of  tiie  proiiotutn  is  also  h-ss.  The  punctua- 
tion of  the  ab(Ioin(^n  is  nnicii  closer  in  imfistitivtus.  The  s(!xual 
characters  are  (piitc  .similar.  Many  of  tlie  .specimens  were  taken  in 
mid-winter. 


111.  S«  bruinalis  n.  sj>. — Form  moderately  elcmj^ated.  I'ubescencu  of 
entire  body  loni;  and  aimndant ;  palo  fusco-cinereoiis  in  color  on  the  head, 
])ron<>tuin,  an<l  idytra,  cinereous,  and  more  dense  on  the  ali(b>nien.  Head 
moderate,  slightly  more  than  twice  as  wide  as  long  ;  interocular  surface 
about  twice  the  width  of  the  eye,  very  slightly  excavated  and  closely  punc- 
tate ;  jtunctures  not  coalescent ;  longitudinal  elevation  well  marked,  carini- 
form  ;  ocular  lines  meeting  at  alniut  one  ami  one-half  lengths  in  advance; 
antennae  rather  short  and  stout,  densely  and  coarsely  setigerous,  dark 
piceous-brown,  al»out  e<iual  in  length  to  the  width  of  head;  third  joint  but 
slightly  longer  than  the  fourth,  thre((  to  six  gradually  decreasing  in  length, 
ten  and  eleven  n\uch  longer  and  thicker  than  the  ninth.  Prothorax  widest 
at  the  middle,  where  it  is  nearly  as  wide  as  long;  sides  tlience  gradually 
convergent  posteriorly  and  slightly  sinuate  ;  anterior  and  posterior  margins 
slightly  arcuate  and  nearly  e<[ual  in  length  ;  surface  evenly  convex,  closely 
pun(!tate ;  inteispaces  rather  less  in  width  than  the  punctures,  shining. 
Elytra  at  base  about  equal  in  width  to  the  head  ;  togtithi-r  broadly  and  evenly 
emarginate  at  the  base  and  apex  ;  sides  almost  imperceptibly'  divergent, 
arcuate  ;  suture  one-fourth  as  long  again  as  the  pronotum  ;  surface  uiujvenly 
convex,  rather  closely  and  finely  punctate  ;  interspaces  about  equal  in  width 
to  the  punctures,  highly  polished.     Abdominal  segments  decreasing  rather 


132 


NORTH    AMERICAN 


rapidly  in  widtli ;  Ixirdcr  moderate  ;  surface  ratlicr  closely  and  Hnely  punc- 
tat(^ ;  transverse  earinae  not  cnsjied.  Legs  rather  dark  fiiseo-piceous,  sonie- 
vliat  sliort  and  stout;  first  joint  of  the  posterior  tarsi  cujual  in  length  to  twice 
the  second,  joints  two  to  four  equal  in  lengtli.  Under  surface  black,  shining, 
Maxillary  i)alpi  having  the  first  two  joijits  pale  testaceous,  third  joint  darker. 

J/((/« .— I'nknown. 

Fiiiiitit'. — Sixth  ventral  segment  having  the  apex  pro<1uced  in  the  form  of 
an  excei'dingty  broad  triangle. 

Length  2.1-2.3  mm. 

Detroit,  Michigan,  2  ;  Ann  Arbor,  Michigan,  1. 


Division  C. 

This,  th<'  conchuling  division  of  the  genus  Stenns  proper,  as  here 
considered,  is  composed  of  species  very  easily  recognizable,  by  the 
absence  of  a  distinct  lateral  border  on  tlie  abdomen,  wlien  viewed 
from  above. 

Tlie  section  was  proposed  by  Erichson,  and  has  been  followed  by 
all  authors  who  have  treated  the  subject ;  still  discretion  is  necessary, 
as  the  border  is  always  present  on  the  first  segment  to  a  greater  or 
less  degree ;  elsewhere,  however,  it  is  obsolete,  being  notliing  more 
than  the  fine  suture  along  which  the  dorsal  and  ventral  surfaces  of 
the  segments  are  joined.  Tiiere  are  rare  cases  where  a  slight  border 
is  also  a|)parent  toward  the  bases  of  several  segments  after  the  first. 

The  following  scheme  may  assist  in  identifying  our  limited  nimiber 
of  sj)ecies;  they  are  all  small  and  for  the  most  part  slendei  in  outline, 
with  the  abdomen  cylindrical ;  they  generally  have  all  the  integu- 
ments roughly  and  dee[)ly  sculptured. 

Punctures  of  elytra  isolated  and  distinct,  not  coalescent. 
Robust,  very  convex,  nearly  cylindrical,  densely  pubescent,  very  coarsely 

punctate 112.  gratiosus. 

Much  more  slender,  depressed,  very  sparsely  pubescent,  finely  punctate. 
Elytral  suture  just  perceptiblj-  longer  than  the  pronotum.     New  Hamp- 
shire   113.  nionticola. 

Elytral  suture  nearly  one-third  longer  than  the  pronotum.     Lake  Supe- 
rior   114.  curtiis. 

Sculpture  of  elytra  consisting  of  move  or  less  coalescent  punctures  ;  generally 
very  roughly,  deeply,  and  tortuously  channeled. 
First  joint  of  the  posterior  tarsi  more  than  twice  as  long  as  the  second. 

115.  alacer. 
First  joint  of  the  posterior  tarsi  distinctly  less  than  twice  as  long  as  the 
second. 

Transverse  earinae  of  abdomen  4-cuspid 116.  hirsutus> 

Transverse  earinae  tricuspid.  , 


/ 


COLEOPTERA.  133 

Elytral  suture  not  more  tlian  one-fourth  longer  than  tlie  pronotuni. 
Coalescent  punctures  of  elytra  forming  long  tortuous  channels. 
Base  an.l  apex  of  protliorax  ecjnal  or  suh-eiaial  in  length. 
I'rothorax  widest  at  the  middle. 

Hides  of  elytra  strongly  arcuate 117.  vestalis. 

Sides  of  elytra  nearly  straiglit 118.   talioeiisis. 

I'rothorax  widest  l)ehind  the  middle 110.   iiiilllllO>US. 

Protliorax  widest  before  the  middle 1:20.  piigetl'lisis. 

A]>ex  of  protliorax  longer  than  the  base. 

Under  surface  of  the  abdomen  polished,  minutely  and  distantly 

punctulato lUl.  TilCUlls. 

Under  surface!  of  the  abdomen  coars(dy  and  closely  punctiilate, 

interspaces  granulose  and  fe»d)ly  shining 1:22.  amicus. 

Punctures  of  elytra  not  coalescent  in  long  and  tortuous  channels, 

and  not  joined  in  sets  of  more  than  two  or  three 123.  exilis. 

Elytral  suture  two-thirds  longer  than  the  pronotum. 

124.  californiciis. 

112.  S,  gratiosiis  n.  sp. — Form  very  robust.  Pubescence  long,  dense, 
rather  coarse,  sub-recumbent,  cinereous.  Head  small,  very  short,  mucli 
more  than  twice  as  wide  as  long  ;  interocular  surface  twice  an  wide  as  the 
eye,  convex;  sulcations  feeble,  rounded  ;  intermediate  surfice  very  strongly 
and  somewhat  acutely  convt^x,  conspicuous  ;  punctures  very  closely  ci'owdcd, 
irregularly  polygonal,  very  coarse;  ocular  lines  meeting  at  two  lengths  iu 
advance;  antennae  slightly  longer  tlian  the  width  of  h(»ad,  robust,  dark 
piceons-brown,  darker  towai'd  the  base,  club  large  ;  third  joint  one-fourth  as 
long  again  as  tlie  fourth,  joints  four  to  seven  uniformly  and  vvvy  gradually 
decreasing  in  length  ;  seventh  slightly  thicker  tlian  the  sixth,  eighth  one- 
half  hunger  than  wide,  as  thick  as  tin?  seventh,  joints  of  club  increasing 
nniforndy  and  rapidly  in  length  and  thickness  ;  maxillary  palpi  somewhat 
short  and  rohust,  dark  piceous-black,  first  joint  translucent,  dark  piceo- 
testaceous.  Prothorax  robust,  arcuately,  evenly,  and  rapidly  increasing  in 
width  to  a  point  distinctly  in  advance  of  the  middh!,  where  it  is  live-sixths  as 
wid(?  as  the  head,  and  as  wide  as  long  ;  sides  thence  rather  rapidly  conv(M-gent 
and  distinctly  sinuate  ;  anterior  margin  slightlv  shorter  and  more  arcuate 
than  the  posterior  ;  surface  very  feebly  tiiberculate  near  the  basal  angles  ; 
coarstdy,  ratln^r  closely,  and  evenly  punctate ;  punctures  r'uiiid,  deeply 
impressed;  interspaces  one-half  as  wide  as  the  punctures,  convex,  highly 
polished.  Elytra  at  base  as  wide  as  the  head;  sides  rather  strongly  diver- 
gent posteriorly,  equal  in  length  to  the  width  at  base,  modtu-at<.'ly  arcuate, 
strongly  so  toward  the  apices  ;  together  broadly,  roundly,  and  strongly  emar- 
ginato  behind;  suture  one-sixth  as  long  again  as  the  pronotum;  surf'i;e 
strongly  convex,  very  feebly  and  narrowly  impressed  on  the  suture  at  the 
base;  coarsely,  rather  closidy,  and  evenly  punctate  ;  interspaces  one-half  as 
wide  as  the  punctures,  c(nive.x,  highly  polished.  Abdominal  segments  de- 
creasing uniformly  and  rather  rapidly  in  width,  first  slightly  narrow((r  than 
the  contiguous  elytra  ;  surface  very  convex,  coarsely,  clos<dy,  and  evenly 
punctulate,  highly  polished  ;    transverse  carinae  4-cuspid,  cusps  equal   iu 


m 


m 


it 


ir,i 


NORTH    AMKItrCAN 


Icii^'th,  IfMif;  and  aciciiliir.  Legs  slifn't  n\u\  rnlxist,  pict'oiis-M.'K^k  alwivc, 
dark  picco-fuscims  lieiicatli  :  liist  joint  of  tlic  i)osttM'ior  tarsi  two-tliirds  as 
loi):;  a^rain  as  tin;  sccoml,  lil'tli  iniirli  lonficr  flian  tlif  first  anil  nion-  .<lcn(i<'r. 

Mule. — Sixth  vcntr.'il  scgnn-nt  broadly  and  niodcratidy  sinuati-  at  tii>;  til'tli 
not  apprt'c'ialily  modilicd, 

l-'cimilc. — Cnknown. 

LtMigth  2.li  nun. 

Dtdroit,  ^Ii(dii<j;iiii,  1. 

I  iini  not  cnlin^lj  cfM'tniii  oC  tin-  sexual  cliaractcrs  in  this  sp<'(:ies, 
owin^i  lo  the  insitilation  of  tli<*  type;  it  i«  a  vciy  distinct  species. 


1 1  '.'>.  S.  niOIlticolit  n.  sp. — Form  inoilfratidy  robust.  I'ubcsccnfc  inodc- 
raicly  hmi,',  cxcci'din^jly  fine  and  sparst^,  more  plentiful  on  tln^  alHlomen, 
cinereous.  Head  two  and  one-half  times  as  broad  as  Ions,';  interoeular  sur- 
face two  and  one-half  times  as  wide  as  the  eye,  eoarsely  and  <iuite  rej^'iilarly 
])nnetate  ;  interspaces  shining  ;  lon},'itudinaI  elevatiipu  rather  acute  and  above 
the  ;.'eueral  level  of  the  eyes,  surface  j^radually  dedivius  '  iterally  to  that 
])lane;  oeiilar  liiK's  very  short,  ineetinj;  at  about  three  lengths  in  advance; 
nnteiinai"  |>iceous-l>laek,  about  eipial  in  len;,'th  to  the  width  of  head,  club 
rather  l;ir;,'e;  third  joint  oue-fourtl:  as  huig  aj,'aiu  as  tlie  tdiirtb.  joints  four  to 
eijrht  i;radually  and  uniformly  decreasing  in  length,  joints  oi'  elub  increasing 
in  length  and  thickness;  maxillary  jialpi  short,  pici'oiis-black.  l>asc  sliglitly 
paler.  Prothorax  rolnist,  widest  at  or  sliglitly  liidiind  the  middle,  wliere  it 
is  four-lifths  as  wide  as  thi  heail,  and  just  perceptildy  i\ai'rower  ilian  long; 
sides  thence  convergent  posteriorly  and  feebly  sinuate  ;  posteri(U'  margin 
shorter  ancl  slightly  less  arcuate  than  tht?  anterior  ;  surface  evenly  convex, 
coarsely  punctate  ;  punctures  deeply  impressed  ;  interspaces  gentu-ally  eipial 
in  width  to  the  punctures,  highly  lustrous.  Elytra  at  base  very  slightly 
narrower  than  the  bead  ;  siiles  very  slightly  divergent  posti^riorly  and  dis- 
tinctly arcuate ;  together  broadly,  rather  strongly,  and  evenly  eniarginate  at 
the  base  and  apex  ;  suture  just  ptu'ceptibly  longer  than  tli(>  pronotum  ;  sur- 
face evenly  convex,  very  coarstdy,  and  somewhat  distantly  punctat4!;  jjunu- 
tures  dei'iily  impresseil  Mn<l  generally  narrower  than  the  interspaces,  which 
are  highly  lustrous.  First  three;  abdominal  segments  as  widi'  <i.;  the  elytra  ; 
border  feeble;  surface  convex,  lustrous,  finely  and  distantly  puujtulate  ; 
transver-ii;  carinae  4cuspid,  cusps  short,  line,  expanded  toward  tip,  intervals 
fetddy  sinuate.  Legs  moderate,  piceous-black,  paler  toward  the  tarsi  ;  first 
joint  of  posterior  tarsi  one-half  as  long  again  as  the  second.  Under  surface 
of  the  abdomen  piceous-black,  moderately  shining,  very  finely  and  idosidy 
punctulate. 

Mitl<\ — Posterior  edge  of  the  sixth  ventral  segment  broadly  and  evenly 
eniarginate  in  its  middle!  two-thirds,  emargination  very  feeble,  (evenly  rounded 
tliroughout. 

Ju'inale. — Sixth  segment  produced  in  the  form  of  an  exi;cediugly  obtuse 
angle. 

J.ength  2.3-2.6  mm. 


White  Mountains,  New  Hampshire,  4. 


COLKOI'TF-.KA. 


135 


114.  S.  cill'tllH  11.  sj). — Form  latlicr  rolnist.  I'liln'sceiice  somewhat 
Hpiirst!,  vi-ry  (iii<-,  iiiinlcriiti'ly  Ion;?,  ciiiiTcous,  Hciiii-ri'cmiibciit  (in  tin;  iiImIo- 
iiinn.  Head  small,  twiiu!  as  wicUi  an  long;  intci'ooiilar  .siirl'aci!  slightly  con- 
vex ;  coarsely,  (!los<!ly,  and  variolately  ])uiictatu  ;  nearly  three  times  as  wide;  as 
the  eye;  longitudinal  elevation  distinet  ;  (iciiiar  lines  meeting  .at  two  lengths 
in  advance;  antennae  much  longer  than  the  wiiUh  of  head,  rather  sli'iider, 
dark,  |)iceous-black,  very  slightly  jialer  toward  tip,  club  large;  third  joint 
oiie-tlilrd  as  long  again  as  the  fourth,  fourth  and  fifth  e(iual  ;  joints  of  cluh 
gradually  increasing  in  si/e,  eleventh  nearly  as  hnig  as  the  ninth  and  tenth 
together,  acMiminate  at  tij) ;  maxillary  palpi  dark  blackisli-fuscous,  lirst  joint 
very  slightly  jialer.  Prothorax  robust,  widest  slightly  before  the  middle, 
where  it  is  seven-eighths  as  wide  as  tin?  head,  and  but  vei'y  slightly  iiiirro\V(!r 
than  long;  sides  thence  moderately  convergent  jiosteriorly  and  very  feebly 
sinuate  ;  anterior  and  posterior  margins  about  ecjual  in  length,  tniually 
arcuate;  surface;  evenly  (convex,  very  closely  and  rath(;r  coarsely  jmnctate; 
puncdures  variolate,  irregular  in  outline,  three  to  four  times  as  wide  as  the 
interspaces.  Elytra  at  base  notably  wider  than  the  head  ;  sides  slightly 
divergent  post(;riorly  and  evenly  arcuate  ;  siiturt;  nearly  one-third  as  long 
again  as  the  proliotum  ;  together  broailly  and  feebly  emarginate  behind; 
surfaci;  strongly  and  rather  evenly  convex,  rather  coarsely  ami  (;V(;nly  jjunc- 
tat(; ;  jiunctures  rounded  and  sub-vaiiolat(;,  very  slightly  broader  than  the 
inters])accs,  which  are  jiolisluMl.  Abdominal  segments  decreasing  evenly 
and  rapidly  in  widtl.  ;  border  narrow  ;  suil'ace  wry  convex,  shining,  rath(;r 
coarsely  punctulatc; ;  transverse  carinae  4-cuspid,  cusps  very  fine  and  short. 
Under  surface  of  tin;  ab<lomen  shining,  finely  ])unctulate  ;  j)ubesct;nce  increas- 
ing rapidly  in  length  and  tliickness  toward  the  tip,  where  it  is  close,  long, 
recuniln;nt,  anij  fusco-cinereous.  Legs  slender,  piceons-black  ;  first  joint  of 
tlie  ])osterior  tarsi  one-fourth  as  long  again  as  the  second,  second  (;(iiial  to  the 
third. 

Mule. — rnknown. 

Fiiiiiilc. — Posterior  edgi;  of  the  sixth  viMitral  segment  vi'ry  broailly  and 
feebly  arcuate  throughout  its  width. 

Length  2.0  uim. 

AVliite  Fisli  Point,  Nortli(!rn  IMicliijian,  1. 

A  species  vory  remlily  recognized  by  tiie  short  first  joint  of  tlie 
posterior  tarsi. 


,  Ml 


■•i 

■4) 


!■ 


It 


11").  S.  alacer  n.  sji. — Form  slender.  Pubescence  rather  short  and 
sparse,  sub-recunibent,  line,  pale  piceo-cini'reous.  Head  robust,  mod(;rate, 
much  less  than  twice  as  wide  as  long;  interocnlar  surface  nearly  twice  as 
with;  as  the  eye,  deeply  (;scavated  ;  longitudinal  elevation  in  the  form  of  a 
very  narrow,  acute  ridge,  rising  abruptly  from  tlu;  bottom;  sn[ira-antennal 
tuberculations  elongat",  se])arated  from  the  eye  by  shallow  sulcations  ; 
puiudures  longitmlinally  coalesc(!nt,  very  uni;venly  distrihute(l ;  interspaces 
polished  ami  Hat;  ocular  lint;s  meeting  at  slightly  more  than  one  length  in 
advance;;  antennae;  much  longer  than  the;  width  of  he-ad,  sli'iider,  jjice-ous- 
brown  throughout,  club  slender  ;  third  joint  slightly  me)r(;  than  onei-third 
longer  than  the  fourth,  fourth  and  fifth  sub-equal,  sixth  much  longer  and 


m 


'i  111 

m 


Wf 


136 


NORTH    AMERICAN 


V 

4 


slightly  more  slciidtir  than  tlio  sovontli ;  eifjhth  one-half  longer  than  wiile, 
joints  of  cliih  increasing  very  rapidly  in  length,  of  nearly  eqnal  width  ; 
maxiilai'v  paljii  very  long  and  sleiidi'r,  jiale  llavati;  throiighont,  second  and 
third  joints  eiinal  in  lengtli.  Prothorax  sub-cylindrical,  arouately,  evenly, 
and  very  gradually  increasing  in  width. to  a  point  slightly  hehind  the  middle, 
where  it  is  nearly  one-sixth  narrower  than  long;  sides  thence  very  feebly 
converg(;nt  and  strongly  sinuate ;  anterior  margin  slightly  shorter  than  the 
posterior,  nearly  e(jnally  arcuate  ;  surfac(^  nearly  ev(!nly  ellii)Soidal  ;  punc- 
tures trunsverstdy  coalescent,  rather  close,  interspaces  very  convex,  polished. 
Elytra  at  base  as  wide  as  or  \ery  slightly  wider  than  the  heail  ;  Ki<les  nearly 
parallel,  almost  straight  near  the  humeri,  distin(;tly  arcuate  near  the  aj)ices, 
longer  than  the  width  at  l)ase  ;  together  narrowly  and  strongly  emarginate 
■behind;  suture  distinctly  longer  than  the  pronotum  ;  surface  very  convex, 
fei'bly  and  narrowly  imjiressed  along  the  suture  ;  coarsely,  evenly,  and  deeply 
punctate  ;  i>unctures  round,  impressed,  and  not  coalescent ;  interspaces  as 
wide  as  the  punctures,  very  convex,  highly  jiolished.  Abdonninal  segments 
decreasing  uniformly  and  very  gradually  in  width,  first  much  narrower  than 
the  contiguous  elytra,  cylindrical ;  surface  rather  coarsely,  closely,  iind  evenly 
punctate  near  the  base:  punctures  di'eply  impressed  and  becoming  so  fine 
toward  the  tip  as  to  almost  disappear;  interspaces  very  highly  polished; 
border  nearly  obsolete  except  on  the  first  segment,  where  it  becomes  rajjidly 
narrower  toward  the  segmental  ap(>x  ;  transverse  carinae  tricusj)id,  middle 
cusps  long,  strong,  and  finely  acuminate,  prominent,  lateral  very  rudimen- 
tary. Legs  long  and  very  slender,  tlavate,  femora  clouded  with  jiiceous 
toward  the  tip,  tarsi  very  long  and  slendt^r  ;  first  joint  of  the  posterior  nearly 
two  and  one-half  times  as  long  as  the  second,  twice  as  long  as  the  llftli,  and 
as  long  as  the  second,  third,  and  fourth  together,  fourth  scarocdy  one-half  as 
long  as  the  third,  fifth  much  more  slender  than  the  i)receding. 

Mule. — Fifth  ventral  segment  very  feebly  emarginate  in  its  middle  third 
at  apex,  emai'gination  not  measurable,  evenly  rounded,  contigucuis  surface 
cylindrically  and  fi.'ebl^  Imjiressed  throughout  anteriorly,  pubescence  very 
coarse;  sixth  triangularly,  narrowly,  and  very  deeply  incised  at  ai)ex,  in- 
cisure fully  twice  as  deej)  as  wide,  angles  somewhat  rminded. 

Fciudlc. — Fifth  segment  emarginate  in  its  middle  eighth  at  apex,  emargina- 
tion  evenly  rounded,  and  abont  eight  times  as  wide  as  deep  ;  sixth  segment 
narrow,  rather  obtusely  rounded  at  apex. 

Length  3. 2-3. 7  mm. 


Cediir  Keys,  Florida,  1 ;  Columbus,  Texas,  1 ;  Arizona,  5 ;  Colo- 
rado, 2  ;  Southern  Illinois,  2. 

The  specimen  of  this  well-marked  species  from  Texas  differs  from 
the  one  from  Florida  in  no  essential  feature  ;  it  a[)pears,  however,  to 
be  slightly  more  mature,  and  the  basal  joints  of  tlie  antennae  are  j)ale 
piceo-testaceous,  the  remainder  being  nearly  piceous-black  ;  it  is  the 
smallest  of  the  entire  number,  and  is  a  female. 

The  above  description  was  ta'ken  from  the  Floridan  female. 


^ 


COLEOPTERA. 


137 


110.  S.  Ilil'81ltlis  11.  sp. — Form  r.athor  robust.  Piibt'sconco  very  long, 
close,  senii-creft,  rather  coars",  cinereous,  conspiouons.  Head  ratlier  small, 
slightly  more  than  twice  as  wide  as  long  ;  interociilar  surface  feebly  convex, 
scarcely  twic(i  as  wide  as  the  eye  ;  longitudinal  elevation  distinctly  wider 
than  the  lateral  portions,  evenly  and  rather  strongly  convex  ;  sulcations  very 
feeble;  punctures  round,  deeply  ini])ressed,  evenly  distributed  ;  interspaces 
nearly  as  wide  as  the  punctures,  very  convex  and  highly  jiolished  ;  ocular 
lines  meeting  at  slightly  more  than  one  length  in  advance  ;  antennae^  much 
longer  than  the  width  of  head,  moderately  robust,  very  coarsely  setose, 
piceous-black,  club  abriij)tly  piceous-brown,  rather  well  developed  ;  third 
joint  one-fourth  longer  than  tin;  fourth,  fourth  and  lifth  equal,  sixth  much 
shorter  than  the  seveiitli,  equal  in  width,  eighth  one-half  longer  than  wide, 
scaritely  enlarged,  cuneate,  ninth  longer  than  wide,  tenth  as  long  as  the 
ninth,  broadei'  than  long,  eleventh  as  wide  as  the  teutli,  acuminate,  m/avly 
as  lo.  "S  the  ninth  anil  tenth  together  ;  maxillary  pal})!  short  and  robust, 
piceous-black,  first  joint  pale  piceo-testaceous,  third  but  slightly  thicker 
than  the  second.  Prothorax  robust,  widest  at  the  middh^,  where  it  is  four- 
fifths  as  wide  as  the  head  and  just  pcu'ceptibly  narrower  than  long;  sides 
theiici!  very  slightly  convergent  posteriorly  ami  feebly  sinuat(?  ;  anterior 
margin  slightly  longer  ami  more  arcuate  than  the  i)((sterior  ;  surface  very 
even,  very  feebly  tuberculate  muvr  tlu^  basal  angles  ;  puncturi^s  small,  round, 
deeply  impressed,  evenly  distributed;  interspaces  slightly  wider  than  th<> 
punctures,  convex,  highly  polished.  Elytra  at  base  as  wide  as  the  hea<l  ; 
sides  feebly  divergcnit  posteriorly,  very  slightly  long(U-  than  the  width  at 
ba»c,  railier  strongly  arcuate  ;  together  veiy  broadly,  roundly,  and  feebly 
enargin.vte  behind  ;  suture  one-eighth  longer  than  the  pronotuin  ;  surface 
Very  convex,  very  feebly  impressed  on  the  suture  toward  the  base  ;  coarsely, 
very  evenly  punctate  ;  juinctures  deeply  impresseil,  round  ;  interspaces  as 
wide  as  the  punctures,  convex,  highly  polished.  Abdominal  segments  de- 
creasing arcuately  and  rather  rajiidly  in  width,  first  as  wide  as  the  contiguous 
elytra,  nearly  cylindrical ;  surface  very  highly  ])olished,  rather  sparsely, 
finely,  deeply,  and  evenly  punctulate  ;  lateral  border  nearly  obsolete,  except 
on  the  first  segment ;  transverse  carinae  4-cuspid,  cusps  rather  short,  equal, 
equidistant,  finely  acuminate.  Legs  rather  short  ami  robust,  black  above, 
piceous  beneath  ;  first  four  joints  of  the  posterior  tarsi  uniformly  decreasing 
in  length,  last  slender  and  much  longer. 

Male. — Sixth  ventral  segment  very  broad  at  apex,  where  it  is  very  broadly 
sinuate,  sinus  occupying  nearly  the  entire  segmental  width,  evenly  rounded 
and  almost  too  feeble  for  measurement. 

Female. — Sixth  segment  angularly  produced  at  tip. 

Length  2.5-2.7  mm. 

Detroit,  IMichigan,  2. 

The  female  associated  with  the  above  type  differs  from  it  in  so 
many  points  that  it  may  prove  to  be  a  distinct  species  ;  tlie  pubes- 
cence is  sliorter  and  thicker,  tiie  elytra  very  much  shorter,  tlie  punc- 
tuaticn  slightly  more  feeble  and  irregular  tiian  in  the  male ;  the 
antennae,  also,  are  entirely  black.     The  description  has  been  drawn 


P 


t\ 


hi 


I" 


'Ml 


i 


■Hi 


'$. 


^Uy 


«P"P 


. L._.Ji. 


138 


NORTH    AMKKICAN 


from  tlie  male  with  cxccittion  of  tlio  moasiiremeuts  of  tlie  tarsal  joints, 
which  were  taken  from  the  female. 


117.  S.  Vt'stalis  n.  sp. — Slciidi'i- ,111(1  fiisil'Dnn.  I'libcsponoe  rather  long, 
coarse,  iii()il(;ralely  close,  rcemnbciit,  and  cinereous  on  tin?  abdomen,  exces- 
Hively  sliort,  sparse,  line,  and  almost  invisible?  on  tlio  remainder  of  the  upper 
surface.  Head  small,  twice  as  wide  as  long  ;  interocular  surfaoi  moderately 
depressed,  scarcely  twice  as  wid(i  as  the  eye;,  coarsely,  rather  closely,  and 
Very  feebly  jinnctate  ;  eiiiially  trilobcd  by  the  very  well-marked  sub^tions  ; 
intermediate  surface  strongly  and  evenly  convex,  prominent ;  punctures  in 
tlie  middle  so  feeble  as  to  be  almost  invisible,  surface  shining;  ocular  lines 
meeting  at  one-half  a  length  in  advance:  antennae  scarcely  as  long  as  the 
width  of  In^ad,  moderately  robust,  pi(^t?ous-black,  (dub  <Ustinct;  joints  three 
to  live  uniforndy  and  gradually  decreasing  in  length,  sixth  and  seventh 
e(|ual,  eighth  somewhat  wider  than  long,  joints  ten  and  eleven  mnidi  more 
robust  tlian  the  ninth  ;  maxillary  palpi  long,  lirst  joint  ti'staceous,  remainder 
piceous-black,  third  densely  S(?tigerous.  Prothorax  small,  widest  at  the 
middle,  where  it  is  four-lifths  as  wide  ,is  the  lie.'id,  and  distinctly  narrower 
than  long;  sides  tbtMict?  vei'y  feebly  convergent  |)osterioily  and  rather  strongly 
sinuate  ;  anterior  and  posterior  margins  equal  in  length,  the  former  much 
tlie  more  arcuat(? ;  surface  slightly  uneven,  Vi'ry  confusedly  and  rather  closely 
punctate  ;  canaliculation  long,  broad,  deej)ly  impressed,  and  very  i)r(niiiiient, 
teniiinaling  at  e(|ual  distances  from  the  margins,  three-fourths  as  long  as  the 
pronotum.  Elytra  at  base  distinctly  wider  [jiaii  the  head;  sides  moderately 
divergent  posteriorly,  very  slightly  longer  than  the  width  at  base  anil  strongly 
arcuati?;  together  roundly  and  rather  strongly  einarginati!  behind;  suture 
on(>-tourth  as  long  again  as  the  pronotum  ;  surface  convex,  feebly  impressed 
on  the  suture  at  base,  coarsely,  closely,  and  very  irregularly  sculptured; 
punctures  very  seldom  isolated,  generally  joined  in  (?oalesceiit  channels. 
Abdomen  nearly  cylindricjil,  segments  decreasing  slowly  and  uniformly  in 
width,  first  much  narrower  than  the  contiguous  elytra;  border  very  slight ; 
surface  v<'ry  coarsely  and  closely  ]>uiH?tulate  ;  transvers(?  carinae  tricuspid, 
eiisi)s  ratluu-  approximate,  long  and  aciculate  at  tips,  very  prominent,  inter- 
vals strongly  sinuate.  Legs  long  and  slender,  black  above,  dark  piceous- 
browii  beneath  :  first  joint  of  the  jiosterior  tarsi  one-half  as  long  .again  as  the 
second,  much  shorter  than  the  fifth,  joints  two  to  four  uniformly  and  very 
gradually  decreasing  in  length. 

Mule, — Unknown. 

Fi'mnle. — Sixth  ventral  segment  rather  narrow,  very  evenly  rounded  be- 
hind. 

Length  2.4  mm. 

Kern  County,  California,  1. 

A  very  distinct  species ;  it  seems  to  come  naturally  in  a  position 
intermediate  between  the  division  with  bordered  abdomen  and  tlio.se 
in  which  it  is  not  mariiined,  the  border  only  being  distinct  ut  the 
bases  of  the  first  two  segments. 


UOLEOI'TKKA. 


139 


I 


i 


US.  S,  talloeilHiH  ii.  sp. — Form  very  niodoratcly  robust.  Pulifseonce 
very  uliort,  si'ini-ci'citt,  si>ai'sn,  soiiu'wlint  uoarsc,  jmli-  fulvous  on  tlic  aliiloiiKMi, 
almost  invisil)lt>  on  the  n-mainilcr  of  tin;  dorsal  smfiK^c.  Head  iiiodiTato, 
twico  as  wido  .as  long;  int(>rocular  surfai'c?  feelily  doprcssfd,  slightly  more 
than  twice  as  wide  as  the  eye;  equally  trilobed  by  the  rounded  and  distinct 
sulfations  ;  intermediate  surface  feebly  and  evenly  convex  ;  jjunetures  fine, 
extremely  close  and  confused  ;  interspaces  almost  lustreless  ;  ocular  lines 
meetiiijjr  at  less  than  one  length  in  a<lvance  ;  antennae  short,  as  long  as  the 
wiilth  of  head,  robust,  ])iceous-black,  club  distinct  ;  joints  three,  four,  and 
five  .'cjual,  sixtli  slightly  longer  and  less  robust  than  the  stn-entb,  eighth 
Hiightly  elongated,  sub-globular,  joints  of  club  increasing  very  rapidl}  in 
length,  last  two  e(|ual  in  width  and  mu(di  thicki-r  than  the  niiitli,  last  joint 
us  long  as  the  eighth  and  niutli  together;  maxillary  i)alpi  moderatt^,  pici'ous- 
black,  first  joint  slightly  paler,  piceo-testaceous.  Prothorax  widest  at  the 
middle,  where  it  is  mere  than  five-sixths  as  wide  as  the  head,  and  very  dis- 
tiuitiy  narrower  than  long  ;  sides  tlience  e(]ually  conviM'gent  anteriorly  and 
posteriorly,  and  nearly  straight,  very  feebly  arcuate  in  the  former  direotion, 
slightly  sinuate  in  the  latter  ;  antcu-ior  and  posterior  margins  snb-ecjual  in 
len!'*h,  the  form(M'  slightly  the  more  arcuate;  surface  very  strongly  tuber- 
cnlate  near  the  basal  angles,  feebly  and  transversely  impressed  behind  the 
apex,  aTid  distinctly  swollen  along  the  borders  of  the  canaliinilation  ;  punc- 
tures line,  excessively  close  and  confused;  intersjjaces  almost  histreless  ; 
caualiculatiou  large,  fusiform,  rather  deeply  impressed  and  conspicuous, 
terminating  at  nearly  equal  distanc(!S  from  the  base  and  api^x,  thrise-fourths 
as  long  as  the  pronotum.  Elytra  at  base  as  wide  as  the  head  ;  sides  nearly 
]>arallel,  slightly  longer  than  the  width  at  base,  nearly  straight,  very  feebly 
arcuate  near  the  apices  ;  together  broadly,  roundly,  and  strongly  eniarginate 
behind;  suture  one-lifth  longer  than  the  pronotnni ;  surface  nearly  evenly 
convex,  deeply,  somewhat  coarsely,  extremely  closely  and  irregularly  luuic- 
ture(l  and  channeled  ;  interspaces  acute  and  very  feebly  shining.  Abdominal 
segments  decreasing  nearly  uniformly  and  very  gradually  in  width,  first 
slightly  narrower  than  the  contiguous  elytrii ;  surface  very  convex,  coarsely, 
closely,  and  evenly  punctulate  ;  transverse  carinae  tricuspid,  cusps  long, 
strong,  finely  acicular  toward  the  tips,  nearly  equal  in  length,  conspicuous, 
intervals  strongly  sinuate  ;  lateral  border  almost  obsolete,  except  on  the  first 
segment  and  at  the  bases  of  the  others.  Legs  mod(!rate,  slender,  piceous- 
black  al)ov(%  femora  blackisli-fus(^ous  beneath  ;  first  joint  of  the  posterior  tarsi 
one-half  longer  than  the  second,  as  long  as  the  second  and  third  together. 

Midf. — Unknown. 

Feimi/i'.. — Sixth  ventral  segment  just  perceptibly  and  very  broadly  angulate 
at  the  apex. 

Length  2.6  mm. 

Luke  Tahoe,  Nevada,  1. 


•s, 

% 


m 


no.  S.  ninibOSUS  n.  sp.  (Fauvel  MS.). — Form  rather  slender.  Pubes- 
cence very  sparse,  rather  short  and  coarse,  sub-recumbent,  very  pale  flavo- 
cinereous  on  the  abdomen.  Heid  moderate,  twice  as  wide  as  long;  inter- 
ocular  surface  strongly  depressed,  nearly  three  times  as  wide  as  the  eye ; 


140 


NOUTII    AMEUICAN 


lon;?itU(linal  elevation  sli<;litly  iiarrow<'r  tliaii  tin'  lateral  portions,  foobly  ami 
evttnly  fonvcx  ;  Hiilcations  romuliMl,  distinct ;  puiiotnri^s  rather  fino,  round, 
Koniewliat  shallow  and  confused  ;  int('rsi)aei's  very  strongly  and  eons])i('iionsly 
granulate,  t'eelily  sliiniiif;  ;  ocular  lines  nieetinj;  at  slij,'litly  more  than  one- 
half  a  leiiffth  in  advance;  ant(*nnae  Very  short  and  robust,  S(;ari;ely  as  loni;; 
as  tho  width  of  h(\ad,  ])iceonR-l)la(!k,  cluh  niodcrattf ;  third  joint  very  short, 
scarcely  one-fifth  longer  than  tlui  fourth,  joints  lour,  five,  and  six  dec-reasing 
nnifornily  and  just  perceptihiy  in  leiiojl^  .six  and  stn-eu  ecpial  in  leiij;tli, 
the  latter  scarcely  perccptihly  thicker,  eighth  very  slightly  elongated,  suh- 
glohular,  as  thick  as  the  seventh,  joints  of  cluh  very  sliort,  tenth  slightly  tho 
hroadest  ;  maxillary  jialpi  rather  long  and  slender,  ]iiceous-hlack,  first  joint 
dark  piceo-testace(nis.  Prothorax  arcualcly,  evenly,  and  very  gradually  in- 
creas'ng  in  width  to  a  jioint  slightly  hchind  the  middle,  where  it  is  slightly 
more  ihan  three-fourths  as  widi-  as  the  head  and  much  narrower  than  long; 
sides  tl  ence  Very  feehly  convergiMit  j)osteriorly,  very  short  and  fi'ebly  sin\iate  ; 
anteri'ii  and  posterior  margins  equal  in  length,  the  former  very  arcuate,  the 
latt.r  veiy  feehly  so  ;  surface  tuherculate  near  the  hasal  and  apical  angles, 
distinctly  swollen  along  the  sides  of  the  (•analicnlation  ;  sculiture  similai'  to 
that  of  the  head  ;  canaliculation  broad,  deeply  impressed,  nearly  equal  in 
width  throughout,  terminating  at  ('(jual  distances  from  tho  base  and  apex, 
four-lil'tlis  as  long  as  the  jironotum,  conspicuous.  Elytra  at  base  as  wide  as 
the  head;  sides  vt'ry  feebly  divergent  postt^riorly,  longer  than  th(^  width  at 
bas(^  and  strongly  arcuate;  together  broadly,  rounilly,  and  strongly  eniargi- 
nate  behind  ;  suture  one-fourth  longer  than  the  pronotum ;  surface  nearly 
evenly  convex,  very  closely,  deeply,  rather  finely,  confusedly,  aTid  coales- 
cenfly  punctal(i ;  interspaces  very  acute,  coarsely  granulate,  feebly  shining. 
Abdominal  segments  decreasing  uniformly  and  rapidly  in  width,  first  much 
narrower  than  the  contiguous  elytra,  cylindrical  ;  border  obsolete  exi'ept  a 
very  obscure  one  on  the  fii-st  segment;  surface  very  coarsely  granulose, 
coarsely,  very  closely,  feel)l\ ,  and  variolately  punctulato  ;  transverse  carinae 
tricuspid,  cusps  closely  approximate,  long,  rather  fintdy  acuminate,  promi- 
nent. Legs  rather  long  and  slender,  iiiceo-fuscous,  paler  and  ruious  be- 
neath ;  first  joint  of  the  posterior  tarsi  two-thirds  longer  than  the  second,  as 
long  as  the  second  and  third  togetlnn-,  and  as  long  as  the  fifth,  joints  two  to 
four  uniforndy  decreasing  in  length. 

Main, — Unknown. 

Female. — Sixth  segment  small,  very  brojidly  and  just  perceptibly  augulate 
at  tip. 

Length  2.2-2.5  n.m. 

Fort  Garland,  Colorado,  2. 

120.  S.  pilgeteiisis  n.  sp. — Form  slender.  Pubescence  rather  long, 
coarse,  abundant,  recumlxMit,  ajid  cinereous  on  the  abdomen,  very  short, 
spar.«e,  and  inconspicuous  on  the  remainder  of  the  npper  surface.  Head 
moderate,  robust,  scarcely  twice  as  wide  as  long ;  interocular  surface  very 
moderately  depressed,  two  and  one-half  times  as  wide  as  the  eye  ;  evenly, 
rather  finely,  and  somewhat  clostdy  punctate  ;  interspaces  flat,  minutely 
reticulated,  somewhat  shining;    longitudinal  elevation  distinctly  narrower 


COLKOPTERA. 


141 


m 


tlian  \\\t^  Literal  iiorfioiis,  evenly  and  ratlier  strongly  convex  ;  oenlar  lines 
nieetini,'  atone  and  one-lialf  lengtli.s  in  advance;  antiMinae  slightly  longer 
than  the  width  of  liead,  i)ieeons-l)laek,  very  slender,  with  exce|)tion  of  the 
llrHt  two  joints  and  the  club,  which  are  tliick  ;  third  and  fourth  jointH  equal, 
fifth  jnst  iiereejitihly  shorter,  sixth  and  seventh  e(iiUil  in  length,  the  latter 
nincli  thicker,  eighth  as  wide  as  long,  cordate;  l;ist  two  joints  nnnh  more 
robust  than  the  ni.ith  ;  maxillary  jialpi  short  and  robust,  first  joint  llavo- 
testaceons,  second  and  tliiid  piceous-black,  thiid  nearly  as  long  as  the  lirst 
two  together.  Prothorax  widest  slightly  before  the  middle,  where  it  is  three- 
fourths  as  wide  as  the  head,  and  distinctly  narrower  than  long,  sides  thence 
very  moderately  convergent  posteriorly  and  slightly  sinuate;  anterior  and 
])osterior  margins  nearly  eiinal  in  lengtli  and  curvature ;  surface  rather 
coarsely,  very  clos(dy,  evenly,  but  rather  confusedly  punctatt; ;  canaliculation 
very  broad,  deeply  impressed,  long  and  prominent.  Elytra  at  base  as  wide 
as  the  head  ;  sides  nearly  i)arallel,  as  long  as  tho  width  at  base,  moderatcdy 
arcnrte  ;  together  broadly  and  just  perceptibly  eniarginate  behind;  suture 
nearly  one-liftli  as  long  again  as  the  pronotum ;  surface  evenly  convex, 
coarsely,  very  closely,  irregularly,  and  confusedly  punctured  and  channeled, 
isolated  jiuucturos  being  S(ddom  seen.  Abdomen  nearly  cylindrical  ;  seg- 
ments uniformly  and  extreuu-ly  gradually  narrowing  behind,  lirst  slightly 
narrower  than  the  contiguous  elytra  ;  border  of  first  distinct  at  base,  that  of 
the  remainder  extremtdy  narrow,  and  to  be  seen  with  difficulty;  surface 
coarscdy  and  closely  punctulato  at  base,  more  finely  and  sj)arsely  so  toward 
ti]) ;  transverse  carinae  tricuspid,  cusps  rather  approximate,  long,  stout, 
aciculate  toward  tips,  prominent ;  lateral  slightly  inclined  inward.  Legs 
rather  long  and  slender,  piceous-black  ;  lirst  joint  of  the  posterior  tarsi  one- 
half  as  long  again  as  the  second,  slightly  longer  than  the  last,  second  and 
third  sub-equal,  fourth  thin  and  obliijue. 

Male. — Posterior  edge  of  the  fifth  ventral  segment  just  perceptibly  sinuate 
near  tho  middle  ;  si.xth  broadly  and  deeply  sinuate  at  tip,  sinus  more  acutely 
rounded  at  the  bottom  than  along  the  sides,  about  four  times  as  wide  as 
deep  ;  seventh  narrowly  truncate  at  tip. 

Female. — Unknown. 

Length  2.1  nun. 

Thurston  County,  Washington  Territory,  1. 

This  delicate  little  species  bears  a  considerable  resemblance  to 
vestalis ;  it  differs  in  the  structure  of"  the  elytra,  in  the  sculpture, 
in  the  tarsal  structure,  and  in  size.  Tiie  remarks  made  upon  tlie 
abdominal  border  of  vestalis  will  a[)ply  with  almost  equal  force  here. 

121.  S.  TacllUS  n.  sp. — Form  ratlier  slender.  Pubescence  short  and 
coarse,  rather  sparse  except  in  the  medial  portions  of  the  abdomen,  plum- 
beous except  along  the  abdomen  and  on  the  head,  where  it  is  conspicuously 
fulvous.  Head  moderate,  twice  as  wide  as  long ;  interocular  surface  mode- 
rately depressed,  more  than  twice  as  wide  as  the  eye;  longitudinal  elevation 
much  narrower  than  the  lateral  portions,  feebly  and  evenly  convex  ;  sulca- 
tious  very  feeble;  punctures  rounded,  ratlier  close,  evenly  distributed,  and 


•  '•J 


142 


NOUTIl    AMKIUCAX 


soiiicwliat  obscure  ;  ociilnr  lines  iiieetiii),'  at  fully  (uio  leiij^th  in  ddvance  ; 
aiiteniiiie  very  slightly  longt^r  than  tho  width  of  hea<l,  robust,  nearly  black, 
club  rather  small  ;  thiril,  fourth,  and  llfth  joints  exactly  e(|ual,  sixth  very 
slightly  shorter,  just  iiercejitibiy  longer  and  dislinetly  more  sleuiler  than  the 
seventh,  ciglith  as  wide  as  the  seventh,  slightly  elongated,  conical,  joints  of 
club  increasing  in  length,  tenth  much  the  most  rolnist ;  maxillary  pal))!  long, 
tirst  joint  pale  j)icen-testaci'ous,  second  slender,  piceous-black,  third  strongly 
clavate,  black.  Prothorax  widest  just  befort!  the  middle,  where  it  is  live- 
sixtliH  as  wide  as  the  head,  and  slightly  narrower  than  long;  sides  thencH 
nioderat(dy  convergent  posteriorly  and  rather  strongly  sinuate  ;  anterior 
margin  very  slightly  huigi-r  and  more  arcuate  than  the  jiostcrior  ;  surface 
distinctly  tuberculato  at  a  Hligitt  distance  from  the  basal  angles,  longitudi- 
nally impressed  on  the  (lanks  at  the  widest  section,  transverstdy  and  dis- 
tinctly impressed  just  bidiind  the  apex  ;  very  dosidy,  finely,  obscurely,  and 
rugulosely  punutate  ;  canaliculation  strong,  fusiform,  rather  roundly  im- 
pressed, bottom  punctate,  beginning  at  (Uie-fourth  the  length  from  the  vertex, 
terniin  iting  at  one-eighth  the  length  from  the  base.  Elytra  at  base  as  wide 
as  the  head  ;  sides  parallel,  longer  than  the  width  at  base,  strongly  arcuate 
posteriorly,  luorc!  feebly  so  near  the  liuineri  ;  together  broadly,  deeply,  and 
evenly  emarginate  behind  ;  suturtf  one-fourth  longer  than  the  j>ronotum  ; 
surface  feebly  impressed  on  the  suture  at  the  base,  tinely,  deeply,  extremely 
closely  and  irregularly  channeled  ;  channids  generally  strongly  arcuate  out- 
wardly, having  a  generally  longitudinal  direction.  Abdominal  segments 
uniformly  and  r.'ipidly  decreasing  in  wi<Uli,  first  much  narrower  than  tiie 
contiguous  elytra,  cylindrical  ;  surface  very  closely,  coarsely,  variolately, 
and  ev'.nily  punctulate,  feebly  shining  ;  lateral  border  very  feeble  except  on 
the  lirst  segment,  where  it  is  distinct  ;  tr/insverse  carinae  tricuspid,  cusps 
rather  approximate,  long  and  acicular,  prominent,  and  exactly  equal  in 
length.  Legs  rather  long  and  slender,  blackish- fuscous  ;  first  joint  of  the 
posterior  tarsi  two-thirds  longer  than  tlm  second,  as  long  as  tlie  seconil  and 
third  together,  and  very  slightly  sliort<'r  than  the  last,  joints  two  to  four 
nniforndy  and  gradually  decreasing  in  length. 

Male. — Fifth  ventral  segment  just  jierceptibly  emarginate  in  its  middle 
sixth  at  apex  ;  sixth  sinuate  at  ajjex,  sinus  much  broader  than  the  ajiices, 
more  acutely  rounded  at  the  bottom,  thrcse  times  as  wide  as  deep;  seventh 
transversely  truncate  at  tip,  angles  rounded. 

Female. — Unknown. 

Length  2.5  mm. 

San  Mateo,  California,  2. 

Distiiiguislit'd  from  vestulis  by  its  more  I'obust  form,  fulvous  pubes- 
cence and  much  finer,  closer  and  more  dianneled  elytral  sculpture. 


122.  S.  amicus  n.  sp. — Form  moderately  robust.  Pubescence  sparse, 
coarse,  short,  nearly  erect,  i)lunibeou8  except  a  few  scattered  hairs  on  the 
liead,  and  clusters  toward  the  nuddle  and  base  of  the  abdomen,  which  are 
fulvous.  Head  small,  robust,  less  than  twice  as  wide  as  long ;  interocular 
surface  nearly  three  times  as  wide  as  the  eye,  rather  feebly  depressed  ;  longi- 
tudinal elevation  nearly  as  wide  as  the  lateral  portions,  feebly  and  evenly 


1 ' 


COI-EOPTKKA. 


143 


(•((iivcx  ;  jMitictnri'S  rntlmr  lur(,'t',  very  closely  nrowrlcil,  evenly  disti'lbiittMl  ; 
inteisp.'iccs  coarsely  j;r.'iinil().se  ;  ocul.ir  lines  iiieetinf?  ,'it  scarcely  cme-lialt'  a 
length  in  advanci; ;  antennae^  slij^litly  longer  than  the  width  of  head,  ratlier 
robiiHt,  pioHous-blaok,  olub  ratlior  jjroniinent  ;  third  joint  sc^nrctdy  (ine-lirth 
lonjier  than  the  tnnrtli,  fourth  and  tlt'th  e(|u.';l,  sixth  and  seventh  eiiual  in 
leii^'th,  and  suh-eiinal  in  thickness,  eij;hth  thicker  than  the  seventh,  sliifhtly 
elonjjntcd,  last  two  joints  niiK'h  thicker  than  the  ninth  ;  maxillary  jialid 
rather  slender,  lirst  joint  fiilvons,  second  piceoiis-lilack,  paler  at  has  •,  tliird 
short,  rather  slender,  piceons-hlack.  Prothorax  widest  at  one-th..ii  tlin 
length  posteriorly,  whore  it  is  flve-8ixths  as  widn  as  tliii  head,  and  narrower 
than  lonj;  ;  sides  thence  moderately  ronverf,'enf  posteriorly,  lonj;,  feebly 
sinuate;  anterior  inari^in  inncb  loiii;er  than  the  jiosterior,  ci|ually  arcuate  ; 
surface  feebly  tuberculatt;  near  tho  basal  anf,'les,  impressed  on  the  Hanks  at 
one-third  tho  lenj;th  from  tlm  api^x  ;  having  a  deep,  ronndecl,  jirominent 
impression  noar  each  anterior  angle;  linely,  very  closely,  som(!wliat  evenly 
inmctati! ;  inters])aceH  narrow,  uneven,  distinctly  granulose  ;  canaliculation 
terminating  at  a  distances  from  the  haso  and  apex  ecjual  to  one-fourth  the 
length,  roundly  impressed,  deep,  fusiform,  and  cons])ieuouK,  bottom  inipunu- 
tatc.  Elytra  at  basc^  wider  than  the  head  ;  sides  very  feebly  divergt-nt  jioste- 
riorly,  slightly  longer  than  the  width  at  base,  strongly  arcuate,  mort^  strcnigly 
BO  posteriorly  ;  togeth(U-  broailly,  roundly,  and  very  strongly  emarginate  be- 
hind: suture  one-fourth  longer  than  the  jironotum  :  surface  deejdy  impressed 
on  the  suture  at  the  base,  feebly  impressed  near  the  humeri  ;  rather  coarsely, 
very  closely,  most  irreg"''ii'ly,  and  tortuously  channeled.  Abdominal  seg- 
ments decreasing  unifv  /  and  rather  rapidly  in  width,  first  slightly  nar- 
rower than  the  contiguous  elytra;  border  neaily  obsolete  except  on  tlu^  lirst 
segment ;  surface  very  coarsidy,  closely,  variolately,  and  evenly  pnnctulate  ; 
interspaces')  coarstdy  granulose  ;  transverse  carinae  tricuspid,  cusps  nearly 
e(inal  in  length,  ratlier  linely  acuminate,  long,  and  prominent.  Legs  very 
slender,  dark  pi(;eo-fus<^ous  ;  lirst  joint  of  the  posterior  tarsi  one-half  longer 
than  the  second  and  distinctly  shorter  than  the  last,  second,  third,  and 
fourth  nniforndy  and  rapidly  decreasing  in  length  ;  all  the  joints  are  coarsely 
granulose. 

Mule. — Unknown. 

Fmimle. — Sixth  ventral  segment  very  obtusidy  rounded  behind. 

Length  3.0  mm. 

Colorado,  2. 

This  species  mny  be  distinguislied  at  once  from  vociuis  by  the 
under  surface  of  tlie  abdomen,  which  in  tiie  latter  is  highly  polished, 
very  sparingly  pubescent,  minutely  and  sparsely  pnnctulate,  while  in 
the  former  it  is  coarsely  and  closely  punctulate,  and  the  interspaces 
are  minutely,  though  distinctly,  granulose  or  reticulated.  The  struc- 
ture of  the  prothorax  of  amicus  is  peculiar  and  very  unusual  in  the 
genus,  and  renders  the  species  very  distinct.  ■       -         ' 

123.  S.  exilis  n.  sp. — Form  slender.  Pubescence  short,  stout,  extremely 
sparse,  semi-erect,  plumbeus,  somewhat  fulvous  on  the  head.     Head  mode- 


■i   II 

r 


_  U.U.  JL. 


in 


NOKTII    AMKUICAN 


rail',  Iwicf  lift  wiittt  an  \oi\ji  ;  iiitci-diiilar  mirfnci*  two  iiiid  tlir foiirtlis  liiiicg 

nK  widt'  Mrt  the  eye,  very  iiiodi'i'ivtely  <le|ireMKeil  ;  loiij^itiKliiial  eleviitioii  very 
Mlinlitly  iwirrower  than  tlie  lateral  iiortioiis,  evenly  ami  rather  stronnly  con- 
vex ;  imiictiireM  rather  larj;e,  feeble,  evenly  ilistrilmteil,  closii,  eonl'ii.seil,  and 
nearly  olmolete  ;  interNjiaces  gramiloHt>;  ocular  lines  nieetin;,'  at  one  lenj;tli 
in  advan(H);  antennae  as  long  as  the  width  of  head,  rather  roliust,  ])iceous> 
Mack,  club  distinct;  jointH  three,  four,  live,  and  seven  Hub-eijnal,  the  last 
sli(;htly  the  thickest,  sixth  slightly  shorter,  eighth  slightly  elongated,  as 
wide  lis  the  seventh,  club  coriipact,  last  two  joints  distinctly  broader  than 
the  ninth  ;  maxillary  (lalpi  moderate,  dark  ])iceoim-br()wn,  first  .joint  iind 
base  of  the  second  |piceo-testace<)us  and  rather  pale.  Prothorax  widest  Just 
before  the  mi  '  He,  wlirre  it  is  six-sevi'nths  as  wide  as  tlie  head,  and  one- 
eighth  narrower  than  long;  sides  thence  very  slightly  convt-rgont  posteriorly 
and  I'eclily  sinuate  ;  anterior  and  postericu'  margins  ctjual  in  length,  the  former 
distinctly  the  more  arcuiitu  ;  siiifaie  dls'inctly  tubercul'ite  near  tlut  biis.il 
angles,  broailly  and  rather  feebly  inii)resHed  on  the  Hanks  near  the  midtlle, 
with  two  rather  small  distinct  im|)ressions  near  the  a])i"al  angles,  llnely, 
clos(dy,  ratlier  evenly  (nmctate  ;  interspaces  roughly  granulose  ;  itanalicnla- 
tion  beginning  at  one-tliiril  the  len;.;tli  from  the  apex  and  extending  t(.  within 
oiu'-fourth  tlie  length  of  tlu!  base,  narrowly  impressed,  nearly  eiiually  wide 
throughout,  not  vei'v  strong,  though  distinct.  Elytra  at  base  wider  than  the 
head ;  sides  parallel,  distinctly  longer  than  the  width  at  base,  rather  strongly 
arcuate,  more  so  posteriorly  ;  together  narrowly,  strongly,  and  roundly  enjar- 
ginate  behind  ;  suturu  one-fourth  longer  tlian  the  pronotum ;  surfaiu!  ftu'hly 
iniiiressed  on  the  siitlirii  at  the  base;  limdy,  somewhat  feebly,  closely,  and 
rather  tn-enly  punctate  ;  punctures  impressed,  seldom  coalescent,  no  uhaniiela 
present ;  interspaces  rouglily  granulose  and  shining.  Abdominal  segments 
decreasing  uniformly  and  rather  rapid!/  in  width,  first  mndi  narrower  than 
the  contiguous  elytra,  cylindrical  ;  border  obsohite  except  on  the  first  seg- 
ment,where  it  is  narrow  and  obscure;  surface  very  closely,  coarsely,  and  evenly 
pnmtiilate;  interspaces  granulose  and  feidily  shining ;  jjuncturiis  liner  and 
more  distant  toward  the  tij> ;  transverse  carinae  tricuspid,  cusps  closely  ap- 
proximate, sub-equal  in  length,  finely  acuminate,  rather  long  and  prominent. 
Legs  rather  short  and  slender,  blackish-fuscous  ,  first  joint  of  the  jiosterior 
tarsi  scarcely  more  tha'  ''-ird  longer  than  the  second,  and  distinctly 

shorter  than  the  fifth,  '  and  three  nearly  equal,  fourth  much  shorter. 

Under  surface  of  en  coarsely,   closely,  and  evenly   puiictulate  ; 

interspaces  rati  a,  not  visibly  reticulated. 

Male. — Fifth  .  segment  just  visibly  and  evenly  emarginato  in  the 

middle,  surface  vei^  narrowly,  tylindrically,  obscurely,  and  feebly  impressed 
throughout  anteriorly  ;  sixth  sinuate  at  tip,  sinus  rather  more  feeble  in  cur- 
v>;ture  than  the  apices,  and  equal  to  them  in  width,  evenly  rounded,  about 
.!i'3ven  times  as  wide  as  deep  ;  seventh  segment  very  narrow,  truncate  at  tip, 
truncation  very  feebly  arcuate.  , 

FeiiKile. — Unknown. 

Length  2.8  mm.  .  ' 

Calitbrnia,  1.       -  > 

Tliis  species  is  distinguished  among  its  near  neighbors  by  its  very 
narrow  slender  abdomen,  by  the  more  uniform  character  of  the  elytral 


1 


COI.KMITKUA. 


I  I.'. 


s(Mil|)tiiri>,  iiikI  liy  the  stnirfnrc  of  iIic  imtfiiimr.  'llw  pnilliorux  licars 
It  jjn'iit  n's«'iiil)liiiic<i  to  tlitit  ot'  iiijiifiis.  Iiaviii;:,  iis  in  tlial  s|)«'oi<'s,  ilir 
Hiimll  iin|>ri'ssioiis  lujir  tin-  iintcriot'  aii<{les. 

124.  S.  C'alif<»l'lii<'IIM  n.  wp. — V«i\\\  very  inndiM-ntt'Iy  i-dliUHf.  I'iiIm'm- 
ctMKMi  hImii'I,  liiii',  riilliiT  Himisi'.  (iml  incdnHiiiciiiiiiH,  Huli-i'ci'Uiiilii'iit,  \tti\i' 
tlnvo-ciiiiTt'oiis.  Head  ijitliir  Hinall,  twice  .ih  wUU  iih  loii)^  ;  iiiti'iociilnr  «iir- 
faci'  iii'iirly  tl'if,  ^^l;L,'ltly  iimrf  tliaii  twi.c  us  wide  as  tin?  cyi- ;  liiiif,'ilii  liiiiil 
I'lcvatioii  vi'py  slijilitly  wi'li'i'  tliaii  tlic  lati-ral  |iiiitii>iis,  cvi-iily  ami  Icflily 
p:>iiv«x  ;  siilc  atiniiH  liroailly  rdiiiicli-il  ;  iimu'tuics  ilc'f|),  very  clitscly  crowilcd  ; 
iiiti'ispaci's  I'daiscly  giiuuildM'  ami  liislrclcss  ;  dciilar  liiii's  iiin'tiii^j  at  diic 
liMi^'tli  ill  a<lvam'i' ;  aiitciiiiai'  distinctly  ldiit,'i'i'  lliaii  tin-  wi<llli  nl'  head,  Mack, 
piccouH  toward  tlio  tii»,  hIciiiIcv,  cliih  niddnatt! ;  tliiid  joint,  diic-litlli  ldM;,'cr 
than  tlic  I'diirtli,  f'linlh  and  lll'tli  equal,  sixth  and  seventh  e(|iial  in  leii;;th, 
the  latter  much  tlii(^kei',  ei>;lilli  suh-uidlnilar,  as  tliick  as  the  seventh,  jdints 
of  chill  iiicrcisiiii'  in  length,  last  two  ei|iial  in  widtli  and  nincii  larjicr  than 
tlie  ninth  ;  ni:i.\illaiy  palpi  slend(M',  deep  black,  llrst  jdint  dark  lilactkish- 
testaicons.  Prothorax  small,  widest  slif^litly  heliind  the  middle;  sides 
thenco  very  I'eidily  convergent  anteridily  and  posteriorly,  aiviiiate,  liecdinini,' 
niiicli  more  strongly  so  in  the  fornn'r  case,  slightly  sinuate  in  tlie  latter; 
anterior  margin  slightly  shoiter  and  nidie  arcuate  than  tin'  posterior;  sur- 
face very  t'eelily  and  transversely  impressed  JwU  lieliind  the  apex,  etherwise 
nearly  evenly  convex  ;  jninctnres  small,  polygonally  crowdiMJ,  ih'cp,  rather 
evenly  distributed  ;  interspaces  coarsely  graniilose  and  sdiiiewhat  lustreless  ; 
canalicnlatioii  well  marked,  two-thirds  as  long  as  the  proiiotiim,  terminating 
at  a  slightly  less  distance  from  the  base  than  the  apex.  Elytra  ;A  base  dis- 
tinctly wider  than  the  bead  ;  sides  nearly  i>arall(d,  much  longer  than  the 
width  at  base,  sommvliat  arcuate  at  two-thirds  the  distance  towar<l  tin- 
Vertices  ;  together  broadly,  roundly,  and  leather  strongly  emaiginate  behind  : 
suture  two-thirds  longer  than  the  proiiotuni  ;  surfai'e  <listinctly  iuijjressed  on 
the  suture  toward  the  base,  ratluir  coarsely,  very  closidy  ))unctate  ;  punctures 
crow(b'd,  rarely  cealescent ;  interspaces  coarsely  granulated.  Abdominal 
segments  decreasing  unit'drmly  ;ind  rapidly  in  width,  lirst  distinctly  narrower 
than  th(i  contiguous  cdytra  ;  surface  very  convex,  coarsely,  deeply,  closidy 
punctulato ;  intevspnct-a  eonrsidy  granulose  ;  transverse  carinae  tricuspid, 
middle  cusjis  (inely  acuminate,  prominent ;  lateral  border  very  narrow  ami 
aluiost  obsoh^te  except  on  the  lirst  segment.  Legs  short  and  slender,  piceous- 
black  ;  first  joint  of  tlie  posteiior  tarsi  <in(?-half  longer  'ban  the  second,  eijual 
in  length  to  the  fifth,  joints  two  to  four  uniformly  and  rapidly  decreasing  in 
length.     Body  winged. 

Mdle. — Fifth  ventral  segment  just  perceptibly  em<arginato  in  the  middle  at 
apex  ;  sixth  narrowing  toward  Un>  tip,  where  it  is  dcjeply  bilobed  ;  cusp 
.slightly  rounded  ;  seventh  segment  narrow  at  the  apex,  where  it  is  trans- 
versely truncate. 

Female. — Sixth  segment  evenly  roundtnl  behind. 

Length  2.1-2.3  mm. 

Lake  Tahoe,  Nevada,  4;  California  (Calainas,  Gilroy,  San  Buena- 
ventura), 5.  ...    .J 

Stenini.  ■  '  10  ,'■'-. 


*  \ 


Ti 


140 


NORTH    AMERICAN 


A  very  distinct  form ;  it  is  distinguishable  at  a  glance  by  its  very 
long  elytra. 

Subgenus  MUTINUS  iiom.  nov. 

The  two  following  species  are  separated  as  a  subgenus  under  the 
above  name,  on  account  of  certain  peculiarities  in  the  antennae. 
These  organs  in  the  male  are  long  and  slender,  and  have  the  ninth 
and  tenth  joints  no  thicker  than  the  seventh,  or  but  very  slightly 
more  robust  ;  the  terminal  joint  '  qual  in  thickness,  but  is  much 
shorter  than  the  penultimate.  Jn  the  female  these  characters  are  not 
striking,  the  club  being  of  nearly  normal  formation,  except  that  the 
last  joint  is  about  equal  in  length  to  the  tenth.  The  general  form  of 
the  body  is  slender  ai\d  sub-cylindrical,  and  the  abdomen  is  not  mar- 
gined laterally.  The  integuments  are  highly  polished.  The  tarsi  are 
normal,  the  last  joint  being  very  short,  and  the  first  very  long. 

The  only  species  thus  far  discovered  within  our  territory  may  be 
distinguished  as  follows  : — 

Larfje  Sjwcios,  4.4  mm.  in  length  ;  punctuation  close.     -Arizona. ..12r).  gilaD. 
Smaller  species,  3. U-;5.S  mm. ;  punctuation  nuicli  more  distant.     Massachu- 
setts to  Texas 126.  dispar. 


w^ 

^'M: 


I'i").  S.  (Itl.)  gilsie  n.  sp. — Form  moderately  slender.  Pubescence  sparse, 
short,  line,  piceous,  inconsincnons.  Head  robust,  much  less  than  twice  as 
wide  as  louj^^ ;  interocular  surfac(^  strongly  dej)i'essed,  twice  as  wide  as  the 
ej'e  ;  longitudinal  ehivation  very  narrow,  strongly  convex,  impunctate,  and 
highly  jn.lished  ;  punctures  moderate  in  size,  rounded,  rather  evenly  dis- 
tributed ;  and  very  closely  crowded  ;  ocular  lines  meeting  at  one-lialf  a  length 
in  advance,  strongly  curvate  anteriorly;  aut(uinae  one-third  longer  than  the 
width  of  head,  slender,  basal  joint  black,  remainder  dark  piceo-testaceous, 
club  very  sbuider  ;  third  joint  very  long,  one-half  longer  than  the  fourth, 
fourth  slightly  shorter  than  the  fifth,  sixth  distinctly  shorter  and  more 
slender  than  the  seventh,  eighth  and  ninth  equal  in  length,  the  latter  dis- 
tinctly thicker  and  slightly  niore  robust  than  the  seventh,  tenth  joint  just 
jxMceptibly  shorter  than  the  ninth,  cylin<lrical,  and  distinctly  tliicker,  last 
joint  three-fourths  as  long  as  the  tenth,  slightly  compressed  ;  maxillary  palpi 
very  long  and  slender,  translucent,  very  pale  tlavate  throughout,  second  and 
third  joints  sub-ecinal  in  length,  fourth  nearly  as  broad  as  long,  very  minute, 
rounded  at  tip.  Prothorax  widest  at  two-thirds  the  hingth  posteriorly,  where 
it  is  distinctly  narrower  than  long;  sides  thenc'e  very  feebly  convergent  liehind 
and  strongly  sinuate  ;  anterior  margin  slightly  shorter  iiud  more  arcuate  than 
the  posterior  ;  surface  evenly  convex,  (h'ej)ly,  very  closely,  and  evenly  punc- 
tate; punctures  elongated  transversely;  interspaces  very  convex,  polished. 
Elytra  at  base  as  wide  as  tlie  head  ;  sid^s  very  feebly  divergent  posteriorly 
slightly  longer  than  the  width  at  base,  strongly  and  almost  evenly  arcuate ; 


f':::' 


COLEOl'TEUA. 


i4;i 


together  deeply  emarginate  beliind;  suture  slightly  longer  than  the  proiio- 
tum  ;  surface  feebly  impressed  along  the  suture,  very  evenly,  rather  finely, 
very  (dosely  i)un(:tate  ;  intcrsjiaccs  not  oncvhalf  as  wide  as  tlie  punctures, 
slightly  convex,  polislied.  Abdominal  segments  decreasing  uniformly  and 
very  gradually  in  width,  lirst  distinctly  narrower  than  the  contiguous  elytra  ; 
surface  extremely  coarsely  and  closely  punctulate  at  the  base,  becoming  finely 
and  much  more  distantly  so  toward  tlie  tij) ;  lateral  border  nearly  obsolete, 
except  on  the  first  s<'gnient ;  transverst;  carinae  tricuspid,  middle  cusps  strong 
and  coarsely  acuminate  at  tip,  lateral  much  wider,  more  rounded  and  some- 
what shorter.  Legs  long,  llavate,  except  the  tips  of  the  femora,  which  are 
shaded  with  castaneous,  femora  robust,  tibiae  very  long  and  slendtM-,  tarsi 
slender,  cylindrical ;  lirst  joint  of  the  posterior  more  than  twice  as  long  as 
the  second,  as  long  as  the  next  three  together,  second  distinctly  longer  than 
the  third,  fourth  very  short,  fifth  e(jual  in  length  to  the  third. 

Mule. — Fifth  ventral  segment  very  feebly  emarginate  in  its  middle  fifth  at 
apex,  emargination  rather  angulate,  about  eight  times  as  wide  as  deep,  con- 
tiguous surface  narrowly  and  cylindrically  imi)ressed  for  two-thirds  its  extent 
anteriorly;  sixtli  deeply  and  narrowly  incised  at  apex,  incisure  one-half 
deeper  than  wide,  vertex  nearly  acute,  sides  slightly  sinuate,  angles  rounded  ; 
sevi-nth  segment  deeply  emarginate  at  apex,  bottom  of  emargination  broadly 
transvers(!,  teeth  strong. 

Fi'iiiule. — Fifth  segmtmt  slightly  roughened  or  spongy  in  the  middle  of  the 
apical  (Mlge  ;  sixth  obtusely  rounded  behind. 

Length  -t.4  nmi. 

Arizona  (Morrison),  18. 

This  species  is  very  closely  allied  to  dispar,  but  differs  decidedly 
in  tlie  nuicli  closer  and  relatively  finer  scnliitiire,  in  tlie  struetiire  of 
the  male  antennae — where  tlie  outer  joints  are  shorter  and  thicker 
than  the  seventh — and  very  markedly  in  size  ;  it  appears  to  be  abun- 
dant. 


126.  S.  (M.)  dispar  n.  sp. — Form  very  slender.  Pubescence  veiy  sparse, 
moderately  long  and  fine,  sub-recumbent,  very  pale  piceo-plumbeous.  Head 
moderat(!,  robust,  much  less  than  twice  as  wide  as  long;  interocular  surface 
twice  as  wide  as  the  eye,  moderately  depressed;  loiigitu<linal  ehivation  very 
narrow,  rather  feebly  and  evenly  convex  near  the  base,  becoming  ex.treme]y 
narrow  and  eariniform  anteriorly  ;  supra-antennal  tuberculations  round,  very 
moderate;  punctures  coarse,  evenly  distributed,  not  coalescent ;  interspaces 
one-half  as  wide  as  the  punctures  ;  ocular  lines  meeting  at  slightly  less  than 
one  length  in  advance  ;  ."iitennae  very  long  and  slender,  much  long(;r  than 
the  width  of  head,  basa  joint  black,  remainder  piceous-brown,  club  elon- 
gated, very  strong  ;  third  joint  one-half  longer  than  the  fourth,  fourtli  shorter 
than  the  fifth  and  just  perceptibly  longer  than  the  sixth,  sixth  very  slightly 
longer  than  the  seventh,  eightli  slightly  more  than  one-half  as  long  as  the 
seventh,  seventh  and  eighth  just  perceptibly  enlarged,  joints  of  clul)  much 
elongated,  tenth  cylindrical  and  as  long  as  the  eleventh;  maxillary  palpi 
very  long  and  slender,  jjale  flavate  throughout,  third  joint  distinctly  longer 


III 

If] 


■41 


I 


32C: 


HHI 


ii; 


»148 


NORTH    AMERICAN 


tliJUi  tlio  st'coiul,  Prothorax  nrcuatcly,  evenly,  aiiil  very  grinliiiiUy  iiicreas- 
iuf;  in  wiiltli  to  a  jioint  sli<fhtly  behind  the  midiUe,  wiieve  it  is  nearly  one- 
filtli  narrower  tiian  lou};,  s'des  thenee  very  teidyly  ('oiivergtnit  ])osteriorly  and 
stron;,'ly  sinuate  ;  anterior  and  posterior  margins  nearly  e<jnal ;  surface  evenly 
ellipsoidal  :  ininetnres  rather  small,  deeply  ir^pressed,  somewhat  coaleacent ; 
interspaees  eonvex  anu  highly  i)olishe(l,  generally  as  wide  as  the  jjunetures. 
Elytra  at  hast'  as  wide  as  the  head  ;  sides  nearly  straight  for  three-fouiths 
the  length  posteriorly,  then  strongly  arcii.'te,  mneh  longer  than  the  width  at 
base;  width  at  linni(>ri  slightly  greater  than  the  distanc^e  between  the  apieal 
angles  :  together  narrowly  and  stroi^gly  emarginate  behind  ;  suture  distinetly 
longer  than  the  jironotum  ;  surface  narrowly  impressed  along  the  .suture; 
punctures  largii,  round,  deeply  iir  pressed,  somewhat  variable  in  size,  nearly 
ev-  distributed  ;   interspaces  nearly  as  wiihs  as  the  jiunotures,  strongly 

eonv(!X,  highly  jiolisbed.  Abdominal  segments  of  nearly  e(jual  width,  muidi 
narrower  than  the  contiguous  elytra;  nearly  cylindrical ;  surface;  nearly  as 
in  (dace)-,  though  rather  more  distantly  punctulate ;  transverse  carinae  tri- 
eusi)id,  midille  cusp  narrow,  rather  strong,  acuminate  ;  lateral  nearly  as  long 
but  much  broader,  rounded  at  the  tip  ;  lateral  border  almost  obsolete  except 
on  the  lirst  segment,  where;  it  is  very  narrow.  Legs  very  long  and  slender, 
jiale  llavate  throughout ;  tirst  joint  of  the  })osterior  tarsi  twice  as  long  as  the 
secMind,  as  long  as  the  next  three  together,  second  as  long  as  the  lit'tli. 

Mdlf. — Posterior  edge  of  the  fifth  ventral  segment  very  feebly  and  triangu- 
larly incised  in  its  nnddh;  l'o\.rth.  incisure  five  times  as  wide  as  <leep,  con- 
tiguous surface  eylindrically  imi)ressed  throughout  anteiioriy,  iiulicsceuce 
dens<>,  coarse,  and  piceous  ;  sixth  segment  very  deeply  and  narrowly  incised 
at  apex,  angle  of  i)icisure  slightly  rounded,  sid<'S  ne^arly  straiglit,  depth  one- 
half  greater  than  the  width  ;  seventh  transversely  truncate  at  tip,  without 
lateral  te.dh. 

Feiiuilc. — Fifth  segment  very  feebly  emarginate  in  its  middle  (burth  at 
apex,  emargination  evenly  rounded  and  not  measurable  ;  sixth  segment  very 
narrow,  somewhat  obtusely  rounded  behind  ;  seventh  truncate  at  tip,  lateral 
teeth  strong  and  porrected. 

Length  3.0-3.8  mm. 


Ciimbridge,  Massacliusetts,  7  ;  Soutliern  States  (locality  unknown), 
1  ;  Texas,  1 ;  Wasliington,  District  of  Columbia,  1  ;  Topeka,  Kansas,  1. 

A  very  interesting  species,  varying  greatly  in  size.  Tlie  above 
description  was  taken  from  the  male,  witii  the  exception  of  that  of 
the  antennae  wiiich  was  drawn  from  a  female.  Tiie  male  antenna  is 
unlike  anything  else  in  the  genus  with  tiie  exception  of  (,ilce,  and  is 
tiliform,  nearly  two-thirds  longer  (hnn  the  width  of  head,  and  having 
the  three  outer  joints  no  wider  than  the  seventli,  all  very  elongated, 
except  the  last,  which  is  scarcely  more  than  one-half  as  long  a.s  the 
tenth.     It  seems  to  be  widely  distributed. 


1 


COLEOPTERA. 


140 


Unrecognized  Species. 

Tin?  following  species  I  liave  been  unable  to  identity,  altliougli 
several  of  tliem  may,  i)erlia|)s,  liave  been  unwittingly  <lesoribeil  under 
other  nunuis  in  the  preceding  pages  : — 

The  original  descriptions  of  these  species,  four  in  number,  are  here 
I'cproduced  in  full,  together  with  the  apjjended  remarks. 

127.  SteilUS  adspector  Miiklin:  iii;,'('r,  crcborrimc  punctatus,  parce 
piibi'sci'iis,  i)ali)is  tiiscis,  Itasi  tostaucis  ;  fronti'  levitcr  excavata,  l)isiilcata, 
interstitio  sulipaviiiato ;  tlioracc  hitituiliiU!  vix  l()nfj;i()i'f,  tibsolotissime  caiiali- 
eiiL'ito,  latcrihiis  luoiliL't'  rotuiulato  ;  elytri.s  tlidrace  dimiilio  fore  longiorilius, 
iiiaf(iiialibus,  aiitcrius  prope  suturaiii  subtdnibisis  ;  abtluuiiiie  nitido,  suliti- 
lius  punutato  ;  fVinoribiis  ultra  medium  rufo-pictsis. 

Lougit.  2  lin.     Latit.  parum  ultra  j  liii. 

Ex  insula  Sitklia  a  D.  Frankenhaeuser  transmissus  ;  cum  praece- 
dente  [»*«/•/<//«««]  rarissime  oc(!urrit. 

Steno  scrutatori  Erichson  certe  proximus,  sed  magnitudine  paulo 
minore  elytris([ue  adhuc  longioribus  diversum  esse  videtur  ("JMiik- 
lin"). 

12S.  S>  Iiarallelopipedlis  Motscluilsky  ;  plumboo-nigor,  creberrimc 
pnnctatus,  palpis  articulo  jirimo  tr.staci'o,  jx'dilms  piccis,  t'cinorilius  dihitio- 
ribus,  picoo-rufis  ;  t'rontu  obsobito  bisub'ata,  iutorstitio  perpariim  couvexo  ; 
thorace  latitudino  parum  huigion^,  posttu'ius  angustato,  sub-inai'(£uali ;  olytris 
thoracis  loiiijioribus,  inttjr  i)uiictui'aui  rugulosis. 


Longit.  1^  lin. 


LiUit.  li  lin. 


Habitat  in  insula  Sitkha  sub  cortice  arborum  rarissime  ;  D.  I'ip- 
pingskiild. 

In  vi(!initate  Steni  humilis  Ericlis.  ponendus  ("  Miiklin"). 

120.  S.  cai'illiceps  Miiklin  :  cyliiidriuus,  robustus,  nigor,  nitidus, 
palpis  fuscis,  basi  tustaueis,  i)arc<!  fbrtitcr  ixuictatus ;  capite  i)er  totam 
longitudincm  I'arinato,  utiiiuiuc  lat<'  sulcato  ;  tlioracn  latitudine  tertia  parte 
longiore,  basin  versus  sul)tilit('r  canaliculato  ;  elytris  tlioracc  sub-breviuril>us, 
abdomine  inmiarginato,  apicom  versus  vix  angustato,  parcissime  subtiliter 
puiictato;  tarsis  artieulo  quiU'to  siinpliei. 

Longit.  l-j  lin.     batit.  fei'e  i  lin. 

Habitat  in  insula  Sitkha  rarissime;    D.  Frankenhaeuser  ("Miik-. 
lin").  . 

130.  §.  iiiiinai'giiiatlis  Miiklin;  cylindricus,  niger,  nitidus,  palpis 
fuscis,  l)asi  testaceis,  ])ari:e  profnnde  punetatus  ;  cajjite  in  medio  eariiiato, 
lUrinque  latius  sed  minus  jjrot'undo  imi)resso;  tlioraoe  basin  versus  subti- 
liter obsoletiuRque  canaliculato  ;  elytris  thoracis  longitudine  ;  abdoiuine  im- 
margiuato,  pareius  subtiliuscjue  punutato;  tarsis  artiuulo  quarto  sim2)lici. 

Longit.  1-1|  lin.     Latit.  ^  lin. 


ii 


150 


NORTH    AMERICAN 


Hivbitat  in  insulii  Ka<ljiik  rarissiine  ;  D.  Ilolmborjr, 
Iiulividiiis  minoribus  St.  nigritnli  Gylli'iili.  maj^nitiuUne  acqualis, 
set!  punctiira  parciore  et  fbrtiore  omnino  diversus  ("  Miiklin"). 


1  ..-..f 


AREUS  n.  gen. 

In  tbe  course  of  remarks  maile  in  tlm  first  part  of  the  present 
memoir,  I  bave  given  most  of  tlie  reasons,  wliieb  appear  to  me 
suilicient  for  tlie  generic  se[)aration  of  tliose  Stenini,  in  wbicb  tbe 
fourtb  tarsal  joint  is  distinctly  bilobed.  Species  in  wbicii  tbese  lobes 
are  not  api)arent,  and  in  wbicli  tbe  fourtb  joints  are  merely  swollen, 
or  sligbtly  emarginate  at  tip,  are  excluded. 

On  tbe  ])late  tbe  maxillae  of  two  representative  species  in  tbe 
genera  Stenus  and  Ahmis  are  figured,  and  it  will  be  seen  tbat  tbey 
exbibit  dirterences  wbicdi  may  be  (!onsid(M'ed  as,  in  a  measure,  vali- 
dating tbe  separation,  ultbougb  it  is  prol)able  tluit  tbere  are  forms 
intermediate; ;  I  Jiave  not  bad  time  to  fully  consider  tbis  ratber  in- 
teresting inv(!stigation.  As  befon;  remarked,  tbere  are  many  more 
aberrant  forms  in  Areus  tban  in  Stenus;  tliose  species  in  wbicb  botb 
the  males  and  females  possess  good  sexual  cbaracters,  abound  in  tbe 
former  and  are  quite  rare  in  tbe  latter,  and,  altbougb  generally 
tbrougbout  tiie  group,  tbe  males  are  smaller  and  more  slender  in 
form  tban  tbe  females,  tbere  are  many  species  of  Areus  in  wbicb  tbe 
reverse  of  tbis  is  tbe  case. 

In  many  closely  allied  species  tbe  tarsal  claws  are  variously,  and 
often  considerably  modified  in  shape.  These  aberrant  forms  are 
figured  on  the  plate,  but  are  not  employed  for  purposes  of  classifica- 
tion, owing  to  tbe  difiiculty  of  viewing  them  to  advantage.  Some  of 
tbe  species  resemble  each  other  very  closely  in  general  appearance, 
and  will  recjuire  very  careful  attention  to  tbe  descriptions  in  order  to 
be  accurately  determined  ;  doubtless  a  few  of  them  still  nnnain  un- 
described.  The  European  species  <«rsrj//s  Ljnugh,  plantaris  Erichs., 
and  cicindeloides  SchiUl.,  are  closely  allied  to  several  of  tbese,  but  are 
quite  distinct;  the  points  of  distinction  will  be  given  under  tbe 
'  corresponding  descriptions. 

Tbe  main  subdivisions  of  the  genus  are  those  generally  followed, 
and  are  very  natural,  tbere  being  no  species  at  present  known  within 
our  faunal  limits,  which  can  give  rise  to  much  doubt  as  to  its  proper 
position.  Tlie  secondary  characters  of  importance  are  few  in  num- 
ber, very  distinct,  and  easily  recognizable  ;  the  tertiary  characters, 
however,  are  very  feeble,  and,  as  tbey  are  forced  to  serve  for  the 


COLEOPTERA. 


151 


great  niaj".'ity  of  tlio  species,  tlie  table  can  only  be  relied  on  as  an 
approximate  jruide  to  the  descriptions. 

On  comparinji  onr  species  of  this  genus  with  those  of  Europe,  we 
find  a  remarkable  difference  in  regard  to  the  proportional  numbers  of 
those  witli  margined  and  unmargined  abdomens.  Of  the  former  the 
Eurofjean  fauna  contains  more  than  four  times  as  many  as  it  does  of 
the  latter,  while  in  the  North  American  representatives,  the  ratio  of 
those  with  margined  abdomen  to  those  in  which  the  border  is  absent 
or  very  rudimentary,  is  about  one  to  nine.  Several  species  in  our 
fauna  have  the  nuirgin  entirely  obsolete  on  all  the  segmen'"  except 
the  first,  where  it  is  distinctly  visible  ;  these  are  all  ino'..  ...  the 

division  with  abdomen  unmargined.  It  is  to  be  reman..  .  aiat  our 
fauna  does  not  contain  any  forms  with  spotted  elytra. 

The  species  occ'iu'ring  north  of  the  jNIexican  boundary  in  North 
America  may  be  provisionally  classified  as  follows  : — 


*  Abdomen  manjim'  . 

Legs  black  ;  tarsi  somotimes  paler. 

Tarsi  pale  testaceous 1.  retrilSllS. 

Tarsi  scarcely  paler  than  the  tibiae  ;  pubescence  longer,  luoie  dense,  and 
much  move  conspicuous. 
Frotliorax  widest  behind  the  middle  ;  elytra  strongly  undulated. 

2.  fratei'11118. 
I'rothorax  widest  slightly  before  the  middle  ;  sides  less  angnlate  ;  elytra 

scarcely  undulated 3.  Ulllbratilis. 

Legs  pale  brownish-testaceous,  clouded  with  dark  castaneous  at  the  junction 
of  the  I'eniora  and  tibiae  ;  size  mucli  smaller 4.  Cl'OCt;atU8» 

**  Abdomen  not  manjined,  or  extremely  narrowly  and  imperfectly  so. 

Fourth  abdominal  segment  wider  than  the  first 5.  advena. 

Abdominal  segments  decreasing  in  width  posteriorly,  sometimes  having  the 
first  three  or  four  sub-equal  in  width. 
Head  broad,  much  %vider  than  the  elytra;  elytral  suture  shorter  than  the 
proiiotu)n. 

Prothorax  widest  before  the  nn'ddle.     Virginia 0.  eiirops. 

Prothorax  widest  at  the  middle.     Florida 7.  IltegaloilS. 

Prothorax  widest  far  behind  the  middle  ;  much  smaller  species.    Massa- 
chusetts   8.  lugeiis. 

Head  moderate  or  small  in  size  ;  elytral  suture  longer  tlian  the  proiuitum. 
Large  species,  not  less  than  3.6  nun.  in  length. 
Legs  black  throughout. 

Prothorax  widest  behind  the  middle  ;  sides  thence  very  feebly  con- 
vergent and  nearly  straight  anteriorly.     Vancouver  Island. 

9.  plicipeiiiiis. 
Prothorax  widest  in  advance  of  the  middle. 


T 


!ii. 


-i'-f! 


ri. 


i! 


1.V2  NORTH    AMKUICAX 

Prothorax  widest  at  tlio  anterior  margin  ;  ajiii.'al  aiif^lcs  ])r()iiiiin>iit. 

10.  agiiafiis. 

Protliorax  widest  slightly  lietorts  tlio  middle,  wluM'o  tlu^  sides  are 

evenly  and  stron^^ly  arcuate 11.  MayL 

Legs  not  black  tlironghout,  sometimes  nearly  uniform  in  color  ;  gener- 
ally, however,  having  strongly  contrasting  hands  of  paler  tint. 

Legs  unit'orndy  ])ioeons- brown  thi'ougliont Il2.  UlliaUilis. 

Logs  almost  uniformly  pale  piceo-lestaoeous  throughout  ;  bead  nuich 

larger,  slightly  broader  tliau  tin*  elytra 13.  flavicoi'llis. 

Ijcgs  black  with  ])aler  band  cu"  bands. 

Legs  black,  with  exce])tiou  of  a  narrow,  strongly  marked  baud  of 
reddish-testaceous  near  the  bases  of  tlio  femora. 

14.  aiiiiiilai-is. 
Legs  lilack  ;    bases  of  the  tibiae  distinctly  and  rather  abruptly 
paler. 
Elytral   j>uuctuatiou  very  sparse,  coarse,  deep,  and  irregularly 

distributed.     Arizona tfi.   |ierf<>ratllH. 

Elytral  punctuation  liner,  sparse,  evenly  distributed.     Florida. 

10.  iiiteHci'iis. 
Legs  black,  generally  clothed  densely  with   plumbeous  or  cinereous 
pubescence  ;  tarsi  alone  paler. 
Elytral  punctuation  very  coarse,  deep,  and  somewhat  spar.se. 

Pronottim   strongly,  obliipudy,  and  conspicuously  swollen   near 
each  basal  an-^le  ;   pubescence  long,  coarse,  anu  prominent. 
Anterior  and  posterior  margins  t)f  the  protliorax  e(iual  in  hnigth  ; 
sides  somewhat  angulate  near  the  middle.     Washington  Ter- 
ritory   17.  pollens. 

Anterior  uiai'giu  longer  tlian  the  posterior  ;  sides  ev(udy  iMunded 

near  the  middle.     Colorado 18.   pateilS. 

Pronotum  very  feebly  swollen  near  the  basal  angles. 
Prothorax  eiiually  wide  at  the  bast>  and  apex. 

Pubescence  short,   coarse,   and   rathtsr  j)rominent  ;    sides   of 

prothorax  arcuate 19.  recouditus. 

I'ubescence  short,  line,  and  inconspicuous;  sides  of  pronotum 
feebly  angulate  ;  body  iiuire  depressed  and  slender. 

20.  iii-oiiiiiq  litis. 
Protliorax  distinctly  wider  at  the  apex  than  at  the  base. 

21.  canadensis. 
Elytral  punctuation   very  line,  closely  crowded,  and   very  evenly 
distributed. 
Very  rcduist  species  ;  head  narrower  than  the  elytra ;  prothorax 
short,  robust,  sides  arcuate. 
Put    sconce  line,  short,  and  very  inconspicuous.    British  Colum- 
bia, Colorado 22.  pingnis. 

Pubesc(uico  long,  rather  conspicuous  ;   ])unctuatioii  much  more 
sparse  ;  interspaces  more  highly  polished.     Colorado. 

213.  utenis. 

Species  more  slender  ;  sides  nearly  parallel  ;  head  as  widt;  as  the 

elytra;  tarsi  much  paler  ;  sides  of  prothorax  rather  angulate. 


m 


COLEOI'TKRA. 


153 


Humeral  angles  of  ulytr.a  not  prominent ;  siiventh  segment  of  the 
abdomen  9  broadly  rounded  behind  to  the  immediate  vertex, 

which  is  somewhat  aiigiilate 24.   f  I'iljcctlis. 

Humeral  ..jj^les  of  elyti'a  very  prominent ;  seventh  scf^nicnt  9 
abruptly  and  obtusely  truneate  beiiind,  tinneatioii  in  tlie 
form  of  a  very  broad  triangle,  angle  at  the  immediate  vertex 

ol)tuse,  but  not  at  all  rounded 25.  |iai>a{;oilis. 

Smaller  species,  not  exceeding  3.4  nun.  in  ItMigth. 
Legs  not  black. 

Very  slender  species. 

Elytral  punctuation  fine,  close  ;  legs  very  dark  brownisb-fiiscous. 

2(j.  obsolt'tiis. 
Elytral  punctuation  coarse,  rather  more  sparse,  legs  pale  piceous- 
brown. 
Anterior  margin  of  the  prothorax  much  shorter  than  the  jxiste- 

rior 27.  ai'tus. 

Anterior  and  posterio''  margins  nearly  e(iual  in  length. 

Interocular  surface  nearly  twice  as  wide  as  the  eye  ;  larger 

species.     Louis'ana 28.  dillltlis. 

InteroiMilar  surface  but  one-third  wider  than  tlu;  eve  ;   very 

small  species.     Florida  2!).  lucridioiialis. 

Species  more  rolnist. 

Legs  j)ale  llavo-testaceous,  variegated  with  dark  castaneous. 
Third  joint  of  maxilhuy  (lalpi  very  long,  rather  sliMider,  tl/ivate  ; 

femora  having  the  distal  tips  darker 30.  calloHUS. 

Third  joint  of  maxillary  palpi  shorter,  very  slender  at  base, 
strongly  and  somew  hat  abiiiptly  clavate,  jiale  i)iceo-testai'eous 

above;  femora  darker  in  their  distal  half 31.  varilies* 

Legs  dark  fuscous  in  color  tlirougbout. 
I'rothorax  distinctly  longer  than  v.'ide. 

Elytral  jjunctuation  very  coarse 32.  ai'CllIlIS. 

Elytral  punctuation  fine  and  close. 

Sides  of  elytra  moderatcdy  convergent  near  the  humeri  ; 
sidles  of  jirothorax  nearly  straight  behind  ;  punctuation 

finer  and  closer 33.  puiictatus. 

Sides  of  elytra  nearly  parallel  toward  the  luimeri ;  humeral 
angles  more-  jirominent  ;  elytral  j>unctuation  coarser  and 
more  distant ;  prothorax  distinctly  sinuate  toward  the 
basal  angles,  rather  prominently  angulate  just  behind 

the  middle 34.  dissent ieiis. 

I'rothorax  as  wide  as  long 35.  Illlbbai'di. 

Legs  black  or  extremely  nearly  so. 

Punctures  of   the   pronotum   extremely   large,    deep,    and   sparse. 
Pacific  Coast. 

Head  as  wide  as  the  elytra  at  base 36.  lactllllis. 

Head  vi-ry  small,  much  narrower  than  the  elytra  ;  elytral  i)unc- 

tuation  slightly  liner  and  more  regular 37.  leviceps. 

Pronotal  punctures  small,  close,  and  nearly  evenly  distributed. 


Ij 


I' 


t .  1 


I 


im\ 


lo4  NORTH    AMEKICAN 

F.lytral  punctuation  vory  coarse,  uuicli  coarser  than  tliat  of  the 
pronotum. 
Sidt's  of  tli(^  prntliorax  distinctly  angulate  bcliinil  tin'  iniildlt!. 

Vancouver  Island :iS.  politllllis. 

Sides  of  i)rotliorax  rounded.     Lake  Superior. ..HI*.  sillli<»lllH. 
Klytral  inmctnation  niucli  finttr,  but  slightly  (roarser  than  that  of 
tlu^  l)ron()tuni  ;  body  move  robust. 
Pubescence  clos(!  and  conspicuous,  plumbeous  ;  punctuation  of 
the  abdomen  extremely  dense.     Wyoming  Territory. 

40.  pei'tiiiax. 

Pubescenc(>  v(U-y  inconsfiicuons  ;  abdominal  punctuation  sparse, 

much  liner.     California 41.   lllcidllS. 

1.  A.  I'Ctril8IIS  n.  sp. — Form  rather  less  robust  than  that  of  friiteinii.i. 
Pubescence  somewhat  long,  fine,  evenly  distributed,  sub-recumbent,  close, 
and  moderately  consiiiciums.  Head  moderate,  twice  as  wid(^  as  long;  labrum 
very  ](roiuiiient ;  interociilar  surface  three  times  as  wide  as  the  eyi^,  sliglitly 
conve.x  ;  siilcations  moderate  though  very  distinct ;  intermediates  surface  twice 
as  widci  as  the  latttral  portions,  broadly,  rather  strongly  and  evenly  convex  ; 
punctures  very  minute,  round,  fecibiy  impressed,  distant  by  twice  their 
widths  ;  ocular  lines  meciting  at  two  hnigths  in  advance  ;  antennae  ratlier 
short  and  robust,  as  long  as  the  wiiltli  of  head,  basal  joint  black,  renniinder 
pale  testaceous,  club  moderate,  slightly  infuscat(! ;  third  joint  scarcely  one- 
third  iong(!r  than  the  fourth,  eighth  distinctly  shoi-ter  an<l  slightly  more 
robust  than  the  seventh,  joints  of  club  slightly  elongated  ;  maxillary  palpi 
shor'  and  robust,  uniformly  pale  testaceous  throughout.  Prothorax  widest 
at  the  middlt;,  where  it  is  distinctly  naii  wer  than  long;  sides  thence  rather 
strongly  convergent  j)osteriorly  and  very  fei-bly  sinuate  ;  anterior  margin 
much  longer  than  the  posterior,  eejualiy  and  feebly  anuiate  ;  surface  very 
feebly  swollen  near  each  basal  angle,  evenly  punctate  ;  pumtfurcs  very  small, 
round,  feebly  impressed,  distant  by  nearly  twice  their  widths;  interspaces 
flat  and  strongly  granulose.  Elytra  at  base  about  as  wide  as  the  head  ;  sides 
moderately  divergent  posteriorly,  much  longer  than  the  width  at  base,  nearly 
straight  to  within  a  very  short  distance  of  th»>  apices,  where  they  are  feebly 
arcuate  ;  together  broadly,  roundly,  and  very  moderately  emarginate  behind  ; 
suture  nearly  one-half  longer  than  the  pronotum  ;  surface  depressed,  narrowly 
and  feebly  impressed  along  the  suture  ;  elytra  not  undulated,  smooth  ;  punc- 
tures small,  round,  evenly  distributed,  feebly  impressed,  distant  by  nearly 
twice  their  widths  ;  interspaces  flat  and  minutely  reticulated.  Abdominal 
segnuMits  decreasing  gradually  and  somewhat  arcuately  in  width,  first  as 
wide  as  the  contiguous  elytra  ;  surface  feebly  convex,  very  minutely  and 
feebly  punctulate  ;  lateral  border  ])rominent ;  transverse  carinae  not  cusped. 
Legs  short  and  rather  slender,  black,  tarsi  uniformly  pale  piceo-testaceous  ; 
first  joint  of  jiostcM'ior  nearly  as  long  as  the  next  two  together  ;  third  and 
fourth  joints  strongly  and  narrowly  bilobed. 

Mule. — Unknown. 

Female. — Posterior  edge  of  the  fifth  ventral  segment  abruptly  more  strongly 
arcuate  in  the  middle  ;  sixth  produced  at  apex  in  the  form  of  a  cusp,  with 
the  point  slightly  rounded  ;  seventh  segment  bilobed  at  tip. 

Lengtli  4.1  mm. 


\\k 


COLEOPTKRA. 


155 


Vancoiivcr  Ishind,  British  Columbia,  1. 

Easily  distinguisiied  Crorn  unihratills  by  tlic  punctiiution,  jiiid  by 
the  hick  of  the  very  distinct  undiilutioiis  of  the  elytral  surfaces  in  tiie 
hitter,  as  well  as  by  its  pale  tarsi  ;  it  a[)proaches  the  Kuropean />/«/<- 
taris  Erichs. 


2.  A.  fraferilllH  u.  sp. — Form  cloiipatfd,  modt'rately  robust.  Pubes- 
ceiuj(i  long,  dciisi',  siilp-rci'iiinlit'iit,  ovciily  ilistrilmtt'd,  very  coiispicurms, 
cinereous.  Head  nuxU'ratidy  small,  robust,  twice  as  wide  as  long;  Ial)rum 
prominent  ;  intcrouular  snrt'aco  near''  tlirce  times  as  wide  as  tbe  eye,  feeldy 
convex  ;  sulcations  very  feeble  ;  intermediate  snrfaee  l)roadly  and  feebly 
convex  ;  punctures  round,  deep,  eyenly  distributed,  small,  distant  by  less 
tlian  their  own  widtbs  ;  ocular  lines  meeting  at  about  two  lengtlis  in  advaiUM- ; 
antennae!  rather  sbort  and  robust,  as  long  as  the  width  of  head,  basal  joint 
black,  joints  two  to  six  pale  testaci'ous,  remaining  livc^  darker,  club  moderate  ; 
third  joint  one-third  longer  than  the  fourth,  eighth  but  slightly  shorter 
and  more  robust  than  the  seventh,  joints  of  club  elongated,  densely  setose  ; 
maxillary  ])ali)i  short,  second  joint  swollen  in  the  middle,  third  fattened, 
dark  piceoiis-brown,  paler  at  the  base,  second  joint  piceous-brown  in  the 
middle,  becoming  paler  at  base  and  tip,  basal  joint  flavate  throughout. 
Prothorax  widest  slightly  beliind  the  middle,  wheri^  it  is  but  little  narrower 
than  long  ;  sides  thencf^  V(!ry  feid)ly  convergent  posteriorly  and  slightly 
sinuate;  anterior  and  posterior  margins  eiiual  in  length,  feebly  arcuate,  the 
latter  very  feebly  sinuate  in  tlic^  middb;  ;  surface  strongly  tuberculate  near 
each  basal  angle,  each  having  a  distinct  oblique  impression  immediately 
before  it ;  punctures  small,  very  feebly  impressed,  round,  evenly  distributed, 
distant  by  their  own  widths  ;  interspaces  Hat  and  tincly  granulose.  Elytra 
at  base  as  wid(>  as  tbe  head  ;  sides  very  feebly  divergent  posteriorly,  nearly 
straight,  much  longer  tban  the  width  at  base  ;  together  rather  broadly, 
roundly,  and  somewhat  strongly  innarginate  behind  ;  suture  two-lifths  longer 
than  the  pronotum  ;  surface  depressed,  broadly,  and  feebly  imi)ressed  along 
the  suture,  especially  toward  the  base,  each  elytron  longitudinally  triundu- 
late  ;  punctures  small,  round,  evenly  distributed,  feebly  impressed,  distant 
by  their  own  widths  ;  interspaces  flat  and  strongly  granulose.  Abdominal 
S(>gmeiits  (h'creasing  uniformly  and  moderately  in  width,  first  as  wide  as  the 
contiguous  elytra ;  border  of  lirst  four  segments  very  strong ;  surface  de- 
pressed, finely  and  evenly  punctulate  ;  transverse  carinae  not  cusped.  Legs 
short  and  stout,  black,  tarsi  dark  piceous-brown  ;  first  three  joints  of  the 
posterior  decreasing  almost  nniforndy  in  liMigth,  fifth  short;  joints  three  and 
four  strongly  bilobed. 

]\fale. — Second  ventral  segment  feebly  fiatttmed  in  the  middh;  fourth  ;  tbird 
and  fourth  feebly  emarginate  in  the  middle  fourth  at  apex,  emarginations 
evenly  rounded,  very  abruptly  terminated  laterally,  contiguous  surfaces 
strongly  impressed  for  a  short  distance  anteriorly ;  fifth  segment  scarcely 
perceptibly  modified  ;  sixth  broadly  and  dcply  sinuate  at  tip,  sinus  much 
narrower  and  more  acutely  rounded  than  the  apices,  somewhat  more  than 
twice  as  wide  as  deep,  surface  feebly  flattened  in  the  middle;  seventh  seg- 
ment rapidly  narrowed  toward  tip,  where  it  is  roundly  and  rather  strongly 


m 


htji. 


ii 


p.  1 


!!*■' 


lit  a 


NOUTII    AMKHICAN 


<»tnarj;innto,  lati-rnl  tcftli  small,  Idti'ral  sctao  Htrong,  Hurfdce  liaving  a  loiigi- 
tudiiial  (carina  in  the  uiiddlo  toward  tlio  baHo. 

FiiiKilf, — Sixth  si'f,'tiii'iit  Htniii),'ly  id'dchiccd  at  njicx,  jiroloufjations  in  tho 
form  of  a  cusp  with  the  point  slij,'htly  roiindi'il  ;  scvi'Mtli  very  narrow  at  tip, 
wlmr(*  it  is  strongly  and  trianj,Milarly  (Miiarginato,  Antennae  nut  hu distinctly 
infiiscate  toward  tip  as  in  the  male. 

Len^'th  (extended)  f  ,  4.1t  mm. ;   %  ,  T).;}  mm. 

AVyotning  Tcfritory,  2;  ^liiniiictto,  Lake  Sujn'rior,  1. 

Very  closely  jiUied  to  iinibratilis,  iiiul  (liilering  tVoin  tlmt  species  in 
tin'  f'()Il()\viii<j  (rliiinicters,  tlic  (ronipnrisons  bcin;!;  inad*!  from  males  : — 

III  fiuitcniKS  tlie  aiitennat^  are  r<'latively  sliorter  and  moie  robust 
tiiaii  in  inithrntifis,  and  ai'c  more  distinctly  darker  toward  tip. 

The  maxillary  palpi  ot  tlie  I'ormer  are  niucii  Ion<;er  and  more 
slender  tlian  tli.w(!  of  the  latter,  in  wliieli  the  second  joint  is  flat- 
tened, narrowed  rapidly  toward  the  base,  nnifonidy  colored  tliroii;^li- 
out,  not  perceptibly  wider  in  tin;  middle  than  at  the  distal  extremity, 
ami  in  which  the  third  joint  is  iiuich  shorter  and  more  strongly  llat- 
tein'd. 

In  tlie  former  the  abdomen  is  more  miinitely  i)unctate  above. 

In  frdteruKS  the  apex  of  the  seventh  segment  is  distinctly  emargi- 
natc  at  tip,  while  in  vmbratills  this  segment  is  rounded  behind. 

In  form,  size,  vestiture,  and  in  almost  all  other  characters  than 
those  mentioned  above,  the  two  species  can  scarcndy  be  separat(,'d,  but 
as  these  dift'erences,  es|)ecially  that  of  the  sexual  modilications  in  the 
seventh  segment,  are  imcpiestionably  specific,  we  can  only  regard  this 
as  a  reiiiiirkable  instance  of  approximation. 

15.  A.  Illllbratilis  n.  sp. — Form  ratlier  rol)ast.  Pubescence  moderately 
long,  dense,  sub-reciimbent,  rather  coarse,  cinereous,  consiiiciiouH.  Head 
moderate,  robust,  nuicli  less  than  twice  as  wide  as  long;  inteiocular  surface 
strongly  convex,  very  feebly  bisulcate,  except  posteriorly,  where  tlie  sulca- 
tions  entirely  disajipear ;  liiiely  and  (evenly  ]iunctat(S  punctures  round, 
deeply  impressed  ;  interspaces  scari'cly  as  wide  as  the  jiunctures,  granulat(!d, 
feebly  convex  ;  ocular  lines  meeting  at  twf)  lengths  in  advance;  antennae 
slightly  long(!r  than  tlie  width  of  liead,  soniewliat  slender,  liasal  joint  black, 
remainder  pale  retblish-testaceons,  club  sh-nder ;  thiiil  joint  one-half  longer 
than  the  fourth,  fourth  and  iifth  equal,  sixth  to  eighth  uniformly  and  gradu- 
ally decreasing  in  length,  the  latter  somewhat  narrower-  than  the  seventh, 
joints  of  dull  elongated,  last  two  equal  in  length,  tenth  somewhat  more 
robust ;  maxillary  ])alpi  fusco-j)iceoiis,  robust,  short,  basal  joint  paler,  second 
and  tliird  joints  strongly  liatteni'd,  coarsely  setose.  Prothorax  arcuately, 
evenly,  and  very  gradually  widening  to  tlu^  middle,  where  it  is  slightly  nar- 
rower than  long  ;  sides  thence  vnry  mod.  rately  convergent  posteriorly  and 
nearly  straight  ;  anterior  and  ])osterior  margins  equal,  nearly  transverse  ; 
surface  very  feebly  swollen  near  the  basal  angles,  finely  and  evenly  punc- 


COI.KOl'TKUA. 


167 


tntn  ;  j)niicturt»fl  rdiiiid,  di'i'idy  iiniircsscil,  iiiti'i'sp.'ii.'M  as  widn  ns  or  wiilcr  tliaii 
th«  pinicturKH,  iiciirly  tlat,  liiicly  },''''i""l'»t<'il,  iiimliTnti'ly  shiiiiii),'.  Elytra  at 
'.lasc  onc-sixtli  widiT  tliaii  tln^  jirotlidrax  ;  xidcs  very  fci-lily  divcrj^ciif  jKiMte- 
liorly,  oiic-tliird  l(m;,'t'r  tliaii  tli(!  width  at  l)ase,  nearly  strai^lit;  to^fctlicr 
narrowly  and  stmii^rly  cniar^inatc  lii-iiiiid  ;  Hiiturc  ont'-tliii'd  lon^'i'r  than  tin- 
jirondtnni  ;  siirt'act'  narrowly  iniprcsscd  alonj;  tlic  sntiirc,  cacli  I'lytron  with 
tlirtM'  longitndinaliy  dispoHi'd  nndiilafionH  ;  jmncturcH  rntlmr  Kniall,  iciiiid, 
(ice|>ly  iniprcsscd,  fvi-niy  di;<tril)iitcd,  distant  hy  slij;htly  iiioii'  than  tiicir 
own  widths,  interspaces  linely  graniiiosi-,  shiiiiiif,'.  Abdominal  se;,Muents 
decreasin;;  ratlier  slowly  but  uniformly  in  width,  lirst  as  wide  as  the  elytra; 
horder  of  lirst  four  sef,'ini'nts  very  stron;,',  then  much  narrower:  surface  very 
flindy  and  evenly  ]>nnctnlate,  shinin;,' ;  transverse  cariiiae  not  <'uspeil.  Legs 
rather  short,  jiiceous-hiaok,  tarsi  much  pah'r,  the  latter  very  rohust  ;  lirst, 
8econd,  and  thiid  joints  of  the  posterior  iinil'orndy  dcci'easin>,'  in  len;,'th, 
fourth  very  strongly  hilohed,  lifth  small. 

Miih', — Posterior  edges  of  the  second,  tliiril,  and  fourth  ventral  segments 
feehly  eniarginate  in  the  middle  fourth,  emargiiiatioiis  very  feehle  and  round, 
contiguous  surfaces  (^vlindrically  imjiiessed,  the  fourth  most  strongly  so;  lil'tli 
segment  transverse  and  entire  at  apt^X,  surface  not  appreciahly  impressed  ; 
sixth  strongly  sinuate  at  apex,  sinus  more  acutely  rounded  than  the  a])ices, 
about  twice  as  wide  as  deep;  seventh  segm<'nt  broadly  and  evenly  I'ounded 
bidiind,  dorsal  armor  very  strongly  developed,  projecting  beyond  the  veuti'al 
portions. 

FciiKilr. — Sixth  segment  very  strongly  and  acutely,  abrujitly  ami  narinwly 
produced  at  ajiex  ;  sf^venth  broadly,  strongly,  and  angularly  eniarginate  at 
tij).  Joints  of  antennal  club  more  robust,  increasing  in  length  ;  last  joint  of 
palpi  longer,  first  and  second  paler. 

Length  4.3-4.8  nun. 

Luke  (iuesnel,  British  Cohinibiu,  10. 

Tills  species  is  extremely  elosely  iiiiied  to  tins  Eiiropeiin  A.  pJaii- 
taris  (Krieiis.),  but  dirters  (Voin  it  in  several  clianiclers  wiiieli  should 
undoubtedly  be  con.sidered  specific  ;  among  tliese  are  tlie  following, 
drawn  from  the  females  of  the  two  forms  respectively. 

In  tlie  IbrnuT  the  dub  of  the  antennae  is  moderately  rol)iist,  and 
not  darl<er  or  scarcely  perceptibly  so;  in  the  latter  tiuj  club  is  ex- 
tremely large  and  prominent,  and  abru|)tly  much  darker  in  color. 

In  the  former  the  seventii  ventral  segment  is  deeply  eniarginate 
behind  ;  in  the  latter  it  is  narrower  at  tij),  wlu-re  it  is  transversely 
truncate. 

The  elytra  in  the  former  are  relatively  longer  and  narrower,  and 
have  the  surface  more  unevenly  undidated.  Tlie  pubescence  of  the 
former  is  longer  and  more  coarse  than  in  the  latter. 

Notwithstanding  these  differences,  the  two  specimens  compared 
above  have  a  most  striking  mutual  resemblance. 


1 

J 


m 


ii 


i  : 


I- 


n 


ii 


■'il- 


i:)H 


NOUTII    AMKUICAN 


4.  A,  croceatllH  u.  hji.  (Kauvcl  MS.). — Form  very  UKidcriitcly  robust. 
I'libt'sciMKu-  iiliiiiiilant,  i-U>M',  Hii)>-r<'(;iiinlii-iit,  vury  coarwe,  I'iiu'rt'oiis,  ratlier 
liiii<;,  iiiiicli  liner,  iiioro  n-ciitnlxMit,  mid  lc:<s  ('iiiis]ii<'iii>iis  on  tlii'  uliiliiiiii>n. 
Head  nuMlcniti',  twic'i!  nn  wide  as  long;  intfrotiilur  «urlaci«  twiei-  as  wide  ivs 
tlm  eye,  very  ttudily  convex,  very  fe«d)ly  Msuli'atH  ;  punoturns  rather  toarse, 
Honii'wliat  evenly  distrilmtecl,  sli(;litly  irr.'iinlar  in  sliape,  deeply  impressed, 
interspaees  nearly  llal,  varying  lioni  one-tliir<l  to  twice  the  widtli  of  the 
punctures,  polished;  ocular  lines  meeting  at  ahont  two  lengths  in  advance; 
antennae  as  long  as  the  width  of  head,  r<din!-t,  hasal  joint  fnsco-piceous, 
remainder  llavo-testaceons,  chih  strong  ;  third  joint  one-halt'  longer  than  the 
fourth,  fourth  and  lifth  ecjual  in  length  ;  sixth  and  seventh  e((ual,  eighth 
Mlightly  shorter,  joints  fif  cluli  nearly  eijual  in  length,  tenth  most  robust  and 
slightly  transvi-rsu  ;  maxillary  palpi  I'ather  long,  pule  llavate  throughout. 
Prothorax  nearly  one-eighth  longer  than  wide  ;  sides  for  thret^fiftlis  the 
length  from  the  ai)ieal  angles  parallel  and  feehly  convex,  then<:e  moderatidy 
convei'gent  posteriorly  and  very  le(d)ly  sinuate;  anterior  margin  distinctly 
longer  tlian  tlie  posterior,  the  former  feehly  arcuate,  the  latter  transverse; 
surface  very  feehly  tuherculate  near  the  hasal  angles  ;  punctures  rather 
small,  round,  rather  sparse,  somewhat  unevtMily  distrihuted,  deeply  im- 
pressed ;  interspaces  nearly  llat,  shining.  Elytra  at  base  scarcely  one-eighth 
wider  than  the  pronotum  ;  sides  moderately  divergent  jiosteriorly,  nearly 
two-lifths  longer  than  the  width  at  base,  almost  straight  ;  together  broadly, 
roundly,  and  rather  strongly  emargiiiate  behiml  ;  suture  one-third  longer 
than  the  jironotum  ;  surface  very  feebly  impressed  ahuig  the  suture  ;  i)Uiic- 
turcs  rather  small,  evenly  distributed,  round,  moderately  impressed  ;  inter- 
spaces wider  than  the  j)ni  ctures,  nearly  llat,  polished.  First  tlireo  abdominal 
segments  of  nearly  e(iual  width,  somewhat  narrower  than  the  contiguous 
elytra  ;  border  strong,  decreasing  in  width  jtosteriorly  ;  surface  very  finely, 
feehly,  evenly,  and  closely  jjunctulate,  sliining  ;  transverse  carinao  not 
cusped.  Legs  slender,  llavate,  with  the  exception  of  the  distal  end  of  tlie 
femora  and  the  base  of  the  tibiae,  which  are  dark  piceous,  tarsi  short  and 
robust ;  lirst  three  joints  of  the  posterior  decreasing  nearly  uniforndy  in 
length,  lifth  nearly  as  long  as  the  first  two  togetlier  ;  third  and  fourth  strongly 
hilobed. 

Mule. — Sixth  ventral  segment  deeply  sinuate  at  apex,  sinus  occupying 
nearly  the  entire  apex,  nearly  in  the  form  of  a  triangular  incisure  with  the 
angle  broadly  rounded,  about  twice  as  wide  as  deep  ;  seventh  segment  broadly, 
roundly,  and  rather  strongly  emarginate  at  tip. 

Female. — Sixth  segment  narrow,  angulato  at  tip. 

Length  3.1— iJ)  mm. 

Nebraska,  1.'3;  Detroit,  Michigan,  81  ;  Marquette,  Lake  Superior, 
2;  l^ong  Island,  2;  District  of  Columbia,  3. 

A  very  abundant  and  well-iimrked  species,  having  a  wide  range  of 
distribution. 

5.  A.  adveiia  n.  sp. — Form  sub-tylindrical,  somewhat  robust.  Pubes- 
cence coarse,  abundant,  rather  long,  sub-i'ecumbent,  cinereous.    Head  small, 

.  f 


COLEOl'TKKA. 


1.^(1 


ro))iist,  Hciwf'i'ly  twice  art  wide  iiH  long  ;  iiitt'i  (ifiilar  .surfin'c  distinctly  convex ; 
three  tiiiieH  lis  wi<le  JIH  the  eye  ;  siileiitioiiH  aliiiont  entirely  olisolete  ;  inter- 
intiliate  HurCaei!  evenly  convex,  niucli  wider  tliaii  the  lateral  pcirtiont* ;  jmno- 
tiirt'H  eeai'Hi',  Very  dime,  xhallnw,  evenly  distrihiitcd,  not  eoaleseeiit  l>iit  poly- 
gonally  erowdi'd  ;  ocular  lines  nietttin;,'  at  aliout  three  lenj,'thH  in  ailvaii<;e  ; 
eycH  small ;  antennae  slender,  about  one-third  longer  than  the  width  of  head, 
basal  joints  Mack,  remainder  rather  dark  i)iceons-hrown,  clnh  very  jtronii- 
nent ;  third  joii.t  one-third  longer  than  the  fourth,  eiglitli  much  elongated, 
shorter  than  tiie  seventh  and  vei'y  slightly  thinner,  joiiitn  of  cUihof  nearly 
equal  length  ;  maxillary  i)ali>i  long  and  slender,  hlack,  ha^al  joint  iii(!eou8- 
lilack,  third  joint  stiongly  llatteni'd.  Prothorax  aicuatelv,  evenly,  and  very 
gva<lually  widening  to  a  ipoint  sliglitly  liehiud  the  middi'-,  where  it  is  slightly 
narrower  tiian  long  ;  sides  thence  very  feebly  convergent  posteriorly  and  dis- 
tinctly sinuate;  anterior  margin  very  slightly  longer  tlian  tln«  posterior,  suh- 
eijually  and  feebly  arcuate  ;  surface  nearly  evenly  convex,  very  feebly  swollen 
near  the  basal  angles  ;  punctures  moderate  in  size,  evenly  distributed,  round, 
rather  deeply  ini])resscd,  separated  by  less  than  one-half  their  own  widths, 
interspaces  convex,  shining.  Elytra  at  base  much  wider  than  the  heail ; 
sides  feiddy  divergent  posteriorly,  nincli  longer  than  the  width  at  base, 
nearly  straight,  except  toward  the  apical  angles,  where  they  l)ecomt^  strongly 
arcuate  ;  togetbiu'  roundly,  strongly,  and  somewhat  narrowly  emarginate  be- 
hind ;  suture  slightly  more  than  oiie-thiiil  longer  than  tlie  pronotiim  ;  surface 
of  each  (dytron  longitudinally  and  feebly  triundulale,  together  impressed  on 
the  suture  in  the  basal  half,  very  coarsely  punctured  ;  punctures  round, 
deeply  impressed,  nearly  evenly  distiihuted,  smaller  near  the  huiueri,  sepa- 
rated by  nearly  their  own  widths  ;  interspaces  feeldy  convex,  shining.  First 
three  abdominal  segments  decreasing  uniformly  and  extremely  gradually  in 
width,  fourth  as  wide  as  tlm  first,  fiftli  nuich  widi'rand  longer,  sixth  abruptly 
much  narrower,  neai'iy  as  long  as  w  ide  ;  pubescence  increasing  greatly  in 
density  toward  the  abdominal  tip;  border  obsolete,  except  on  the  first  seg- 
ment, where  it  is  very  narrow  ;  surface  nearly  cylindrical,  polished,  rather 
finidy  and  (n'enly  punctulate  ;  transverse  carinae  tricuspid  on  the  lirst  and 
Second  segments,  very  obscurely  so  on  the  rcimainder.  Legs  rather  slender, 
black  ;  tarsi  piceous-black  ;  fourth  joints  strongly  bilobed. 

MdUi. — Posterior  edge  of  the  fifth  ventral  segment  abruptly  niort;  strongly 
arcuate  in  the  uiiddle,  strongly  and  very  narrowly  impress(^d  at  the  innuediate 
apex,  inijiression  totally  disappearing  at  a  very  short  distance  anteriorly; 
sixth  segment  very  narrowly  and  deeply  sinuate  at  tip,  sinus  very  acutely 
rounded  at  tlu*  bottom,  slightly  deepei'  than  wide  and  extending  nearly  the 
entire  length  of  tlie  segment  ;  seventh  broadly,  deeply,  and  roundly  emargi- 
nate at  tip,  surface  narrowly  carinato  in  the  middle  near  the  base. 

Fcinali'. — Sixth  segment  broadly  and  feebly  angulate  at  the  apex.  Fourth 
dorsal  segment  but  slightly  wider  than  the  first,  fifth  slightly  narrower  than 
the  fourth,  sixth  much  shorter;  punctuation  slightly  more  sparse. 

Length  4.0-4.4  mm.  ,  ,      ■ 

Wliite  Fish  roint  and  Mjvquette,  Lake  Superior,  4. 
INIay  be  recognized  witlioiit  ditHcnlty,  by  tlie  very  singular  enlarge- 
ment (•'■  the  fourth  and  filth  ventral  segments,  especially  in  the  male. 


100 


NORTH    AMERICAN 


;  1 


*t    1 


The  surface  of  the  pronofiim  appears  to  he  much  rougher  and  more 
irregular  in  the  femah*.  The  eyes  are  comj)aratively  small  and  in- 
conspicuous, very  narrow. 

<;.  A.  curops  11.  sp. — Form  slender,  siib-pylinilriral ;  sides  nearly  paralhd 
l)(!liiiid  the  lu^ad  ;  pubesceiiee  sparse,  reeuinlnMit,  fine,  picu'O-eiiiereoiis,  in- 
conspieuous.  Head  very  large,  tiiiieli  wider  than  any  other  jjortion  of  tlio 
body,  fully  twiee  as  wide  as  long  ;  interocular  surface  moderately  dei)ressed, 
less  than  twiei^  as  wide  as  the  eye  ;  snleations  moderate  in  depth,  rounded 
at  the  hottdiii  ;  intermediate  snrfai(!  rather  strongly  (convex,  wider  than 
the  lateral  portions  ;  pniutnres  large,  ev<'nly  distrihuted,  deeply  impressed, 
round  ;  interspaces  much  narrower  than  the  punctures,  modeiately  <onvex, 
shining ;  ocular  lines  meeting  at  slightly  more  than  one  liMigth  in  advance  ; 
antennae  sligl't'y  longer  than  the  width  of  head,  slender,  pale  piceons-hrown 
throughout;  third,  joint  two-thirds  longer  than  the  fourth,  joints  of  club 
elongated,  narrow,  increasing  slowly  in  length,  last  tw<:  of  ccpial  width; 
maxillary  palpi  long,  slender,  pii.'eti-llavate  throughout.  Prothorax  widest 
distinctly  in  ailvanee  of  the  middle,  where  it  is  slightly  narrower  than  long; 
sides  moderately  ccuivergent  jiosterjorly  and  feebly  sinuate;  anterior  margin 
longer  than  the  posterior,  neai'ly  iM|ually  and  very  feebly  arcuate  ;  surface 
very  feebly  tiiberculate  near  the  basal  angles;  narrowly  and  distinctly 
canaliculated  nearly  throughout  its  length  ;  puncture's  close,  rather  str(Uig, 
confusedly  coalescent  at  some  spots,  isolated  at  others  ;  interspaces  narrow, 
convex,  and  shining.  Elytra  at  base  much  narrower  than  tlu;  prothorax, 
(.Hjual  in  width  to  the  latter  at  base  ;  sides  strongly  divergent  posteriorly, 
much  longer  than  the  width  at  bar>e,  strongly  and  evenly  arcuate;  togethm- 
broadly,  roundly,  and  extremely  strongly  emarginate  behin<l  ;  suture  much 
slnu'ter  t!  I'.n  the  pronotum  :  surface  of  each  elytron  near  the  suture  narrowly 
impressiMl,  siitural  margins  not  depressed  ;  punctures  deeply  impressed, 
somewhat  even,  nearly  coalescent,  rounded ;  intersi)aces  much  narrower 
than  the  punctures,  very  strongly  convex,  polished.  First  three  abdominal 
segments  eiiiial  in  width,  as  wide  as  the  contiguous  elytra  ;  surface  ])()lished  ; 
nearly  cylindrical  ;  closely,  evenly,  and  coarsely  punctulate  ;  transverse 
carina(^  not  cusped  ;  lateral  margin  obsolete  except  at  the  bases  of  the  seg- 
ments, where  it  is  very  narrow  and  fetdile.  Legs  slender,  jjale  piceous-brown 
throughout ;  first  joint  of  the  posterior  tarsi  as  long  as  the  next  three  together  ; 
fourth  narrowly  bilobed. 

Male. — Sixth  ventral  segment  sinuate  at  n\w\,  sinus  as  wide  as  the  apices, 
more  acutely  rounded  at  the  bottom,  strong,  nearly  four  times  as  wide  as 
deep  ;  seventh  deeply  and  roundly  emarginat(!  at  tip,  lateral  teeth  acute. 

Female. — Sixth  segment  broadly  angulate  at  the  apex. 

Length  3.1-3.7  unn. 

Deer  Park,  Maryland,  7  ;  Lee  County,  Virginia,  4 ;  Pennington 
Ga[),  Virginia,  1. 

Closely  related  to  megalops,  althougli  the  abdomen  i.s  more  dis- 
tinctly margined  in  that  species.  The  very  large  conspicuous  head 
in  tiu'se  specie?  forcibly  reminds  us  of  strangulatus  in  the  preceding 
genus. 


'I 

! 


COLEOPTKRA. 


161 


7.  j4.  inegaloi>8  n.  sp. — Form  slender,  sub-cylindrical ;  sides  behind 
tlie  liefid  nearly  iiiirallel.  Pubescence  very  s))arrte,  more  ])li'Utiful  on  the 
abdomen,  piceo-cinereous,  inconspicuous.  Head  very  large,  twice  as  wide  as 
long  ;  interocular  surface  very  feebly  depressed,  not  twice  as  wide  as  the  eye  ; 
wulcations  rather  feeble  ;  intermediate  surface  slifjhtly  wider  than  tin;  Literal 
portions,  moderately  and  evenly  convex  ;  punctures  coarse,  de(!])ly  imint'sseil, 
rather  close  and  evenly  distril)uted  ;  interspaces  very  convex,  highly  polished  ; 
ocular  lines  meeting  at  two  lengths  in  advance,  very  feel)ly  convergent  ; 
antennae  distinctly  longer  than  the;  width  of  head,  ti'ansluoent,  piceo-tesla- 
ceous,  nearly  black  toward  the  base,  slender,  club  moderate  ;  joints  nine, 
ten.  and  eleven  in-'reasing  rapidly  in  width  and  length,  slender;  maxillary 
pali)i  rather  long  and  slender,  Havo-testaceous,  darker  toward  the  base,  very 
translucent.  Prothorax  arcuately,  evenly,  and  rathe'  raiiidly  increasing  in 
width  to  the  middle,  where  it  is  much  narrower  than  the  head  and  sliglitly 
narrower  than  long  ;  sides  thence  moderately  convergent  posteriorly  and 
feebly  sinuate  ;  anterior  au'i  posterior  margins  e(iual  in  length  and  curva- 
tui'e,  moderately  arcuate  ;  surface  fei-bly  and  narrctwly  tuberculate  at  a  short 
distance  from  each  basal  angle,  also  longitudinally  canaliculatea  ;  punctures 
coarse,  irrt'gularly  distributed,  not  crowded,  deeply  impresse<l ;  interspaces 
convex,  polished  ;  canaliculation  rather  fetdily  impressed,  bottom  rounded, 
fusiform  in  shape,  nearly  as  !ong  as  the  pronotum.  Elytra  at  base  much 
narrower  than  the  pronotum,  equal  to  the  width  of  the  latter  at  base;  sides 
very  strongly  divergent  posteriorly,  longer  than  the  width  at  base,  very 
strongly  and  evenly  arcuate  ;  together  broadly,  roundly,  and  strongly  (uuar- 
ginate  behind  ;  suture  distinctly  shorter  than  the  pronotum  ;  surface  m>t 
appreciably  impressed  along  the  suture  ;  coarsely,  rather  evenly,  and  somt;- 
what  distantly  j)unctate  ;  interspaces  wider  than  the  punctures,  convex  and 
polished.  Abdominal  segments  as  wide  as  the  contiguous  elytra  ;  scarcely 
perceptibly  decreasing  in  width  ;  border  extremely  narrow,  rather  depressed 
than  reflexed  ;  surface  convex,  very  highly  polished,  deeply,  somewhat  finely 
and  evenly  punctate  ;  transveise  carinae  not  cusped ;  lateral  spiracles  very 
distinct.  Legs  pale  i)iceous-brown,  slender  ;  first  joint  of  the  posterior  tarsi 
as  long  as  the  next  three  together  ;  fourth  joints  narrowly  bilobed. 

Mull'. — Sixtli  ventral  segment  narrow  at  apex,  where  it  is  sinuate,  sinus 
occupying  tlie  entire  apex,  evenly  rounded,  very  feeble  ;  seventli  rouiully 
emarginate  at  tip,  toothed  laterally. 

Femithi. — Sixth  segment  evenly  rounded  behind. 

Lenstli  3.6-4.0  mm. 


1 


'[f 


kt 


Crescent  City,  Florida,  10. 

This  species  is  rennirkable  for  its  very  large  head  and  the  r'^culiar 
structure  of  the  elytra ;  it  snould,  perliaps,  be  placed  in  a  subgenus 
together  with  eiiro/)s. 

The  sexual  characters  are  very  slight. 


8.  A.  iMgeilS  n.  sp. — Form  slender,  sub-c         irical.     Pubescence  short, 
sub-erect,  sparse,  and  inconspicuous  ;  surface  of  the  body  highly  jiolishi  d. 
Head  large  and  very  robust,  scarcely  two-thirds  wider  than  long  ;  interocular 
Stemm.  11 


■m ! 


,  \ 


1G2 


NORTH    AMERICAX 


surface  very  narrow,  scarcely  one-third  wider  than  the  eye,  lUu  ;  aulcatioiis 
almost  obsolete  and  very  obscure  ;  punctures  rather  fine.  rl';;litly  confused 
and  irregular  ;  ocular  lines  meeting  at  one  length  in  advance  ;  eyes  extremely 
large  and  prominent,  twice  as  long  as  wide  ;  antennae  slightly  longer  than 
the  width  of  head,  rather  'slender,  piceo-testaceous,  becoming  much  darker 
and  piceous-brown  at  the  tip,  club  rather  prominent;  third  joint  scarcely 
one-third  longer  tlian  the  fourth,  eighth  as  wide  as  long,  intermediate  in 
width  between  the  seventh  and  ninth,  joints  of  club  robust;  maxillary  palpi 
long,  piceo-testaceous,  becoming  nearly  flavate  at  the  base,  third  joint  rather 
robust.  Prothorax  arcuately,  gradually,  and  evenly  increasing  in  width  to 
a  point  nearly  three-fourths  the  length  posteriorly,  where  it  is  about  one-fifth 
narrower  than  long:  sides  thence  feebly  convergent  and  distinctly  sinuate  ; 
anterior  and  posterior  margins  equal  in  length,  the  former  slightly  the  more 
arcuate  ;  surface  strongly  and  nearly  evenly  convex,  finely,  closely  punctate  ; 
punctures  round  and  moderately  imjiressed.  Elytra  at  base  much  narrower 
than  the  head  ;  sides  feebly  divergent  posteriorly,  much  longer  than  the 
width  at  base,  rather  strongly  and  evenly  arcuate  ;  together  broadly,  roundly, 
and  very  deeply  emarginate  behind  ;  suture  very  slighUy  sliorter  than  the 
pronotuni  ;  surface  nearly  evenly  convex  ;  coarsely,  deeply,  closely,  and 
evenly  punctate.  First  four  abdominal  segments  equal  in  width,  very 
slightly  narrower  than  the  contiguous  elytra,  cylindrical,  strongly  con- 
stricted at  base ;  border  obsolete ;  surface  densely  and  rather  coarsely 
punctate.  Legs  rather  short  and  sl'uder,  piceous-brown,  distal  tips  of 
femora  and  basal  tips  of  tibiae  very  slightly  darker  ;  first  joint  of  the  poste- 
rior tarsi  as  long  as  the  next  two  together,  second  slightly  longer  than  the 
third  ;  fourth  joints  strongly  bilobed. 

^fale. — Posterior  edge  of  the  fifth  ventral  segment  just  visibly,  ncarrowly, 
and  roundly  emarginate  in  the  middle,  emargination  indefinitely  terminated 
laterally;  sixth  narrowly  and  deeply  incised  at  apex,  incisure  one-half 
deeper  than  wide,  having  the  anterior  and  exterior  angles  very  feebly 
rounded,  sides  straight;  seventh  segment  narrow  at  tip,  where  it  is  very 
feebly  and  roundly  emarginate. 

Female. — Unkuown. 

Length  2.8  mm. 

Cambridge,  Massachusetts,  1. 

This  is  a  very  distinct  species,  allied  by  the  form  of  the  head  and 
elytra  to  europs  and  megalops ;  apparently  intermediate  between 
them  and  the  usual  type,  but  having  a  much  greater  affinity  with  the 
former. 

9.  A.  plicipenni»  n.  sp.  (Schwarz  MS.). — Form  rather  slender. 
Pubescence  excessively  sparse,  fine,  moderately  long,  and  very  inconspicuous. 
Head  moderate  in  size,  robust,  about  twice  as  wide  as  long  ;  interocnlar  sur- 
face two  and  one-half  times  as  wide  as  the  eye,  slightly  convex  ;  sulcations 
rounded  througliout,  rather  strong ;  intermediate  surface  much  wider  than 
the  lateral  portions;  punctures  moderate  in  size,  round,  sparse,  very  irregu- 
larly disposed ;  medial  regions  with  but  one  or  two  punctures  ;  iuterapacea 


COLEOrTKUA. 


ir,3 


convex  and  vevy  liighly  polinlied  ;  ocnlar  lines  meeting  at  about  two  lengths 
in  advance;  mtennae  much  longer  than  the  width  of  head?  very  slender, 
hasal  joint  hlack,  second  piceous-black,  remainder  piccouH-ljrown,  club 
prominent,  very  loose;  joints  three  to  five  very  long,  unif'orndy  and  gradu- 
ally decreasing  in  length,  joints  of  club  increasing  in  length  and  thickness  ; 
maxillary  palpi  long,  black,  piceous-biack  at  the  base,  third  joint  ratlier 
robust.  Prothorax  widest  just  behind  the  middlti,  where  it  is  distinctly 
narrower  than  long  ;  sides  thence  nearly  straight  and  very  slightly  conver- 
gent anteriorly,  moderately  convergent  and  feel)ly  sinuate  posteriorly  ;  ante- 
rior margin  much  longer  than  tlie  jiosterior,  nearly  ecjually  and  feebly 
arcuate;  surface  with  an  elongated,  obliipie,  iiupunctate  tulierculation  near 
each  basal  angle,  and  a  median  fusiform  impunctate  and  slightly  elevated 
area,  beginning  slightly  in  advance  of  the  luiddle,  and  extending  nearly  to 
the  base  ;  punctures  rounded,  very  deeply  impressed,  somewhat  distiint  and 
irregularly  distributed,  entire  surface  extremely  highly  polished.  Elytra 
at  base  very  sl\,htly  narrower  than  the  head  ;  sides  rather  feebly  divergent 
posteriorly,  longer  than  the  width  at  base,  rather  strongly  arcuate,  more 
strongly  so  posteriorly  ;  together  broadly,  roundly,  and  rather  feebly  einar- 
ginate  behind  ;  suture  about  one-eighth  longer  than  the  pronotum  ;  surface 
slightly  uneven  near  the  middle  of  each  elytron,  feel)ly  impressed  on  the 
suture  at  the  base ;  punctures  round,  deep,  small,  sparse,  nearly  evenly 
distributed;  interspaces  convex  and  extremely  highly  polished.  First  four 
abdominal  segments  equal  in  width,  cylindrical,  slightly  narrower  than  the 
contiguous  elytra;  surface  polished,  somewhat  rugulose,  very  sparsely  and 
indefinitely  punctulate  ;  border  obsolete  ;  transverse  carinae  tricuspid,  mid- 
dle cusp  alone  prominent.  Legs  rather  short,  slender,  black  throughout; 
first  three  joints  of  the  posterior  tarsi  almost  uniformly  and  very  rapidly 
decreasing  in  length  ;  fourth  strongly  bilobed. 

Mala. — Posterior  edge  of  the  fifth  ventral  segment  emarginate  in  its  middle 
fifth,  emargination  rounded,  very  feeble  and  very  unevenly  outlined  ;  sixth 
segment  very  narrowly  and  deeply  sinuate  at  apex,  siuus  very  acutely 
rounded  at  the  bottom,  nearly  as  long  as  the  entire  segment,  much  deeper 
than  wide ;  seventh  broadly  emarginate  at  tip. 

Female. — Sixth  segment  very  obtusely  rouiiued  behind,  almost  truncate. 

Length  3.7-4.0  mm. 

Vancouver  Island,  British  Columbia,  7. 

This  very  fine  distinct  species  is  cons[)icuous  for  tiie  longitudinal 
impunctate  carinilbrm  swelling  of  tiie  pronotum,  and  the  excessively 
liigii  {K)lish  of  the  head,  pi-onotum,  and  elytra. 


10.  A«  agnatus  n.  sp. — Form  moderately  robust,  feebly  depressed. 
Pubescence  K,ng,  coarse,  sub-recumbent,  rather  sparse,  cinereous,  and  some- 
what conspicuous.  Entire  surface  liighly  polished.  Head  rather  small, 
robust ;  labrum  large  ;  interocular  surfaci^  much  more  than  twice  as  wide  as 
the  eye,  convex  ;  sulcations  narrow  and  mcxlerately  distinct ;  intermediate 
surface  wider  than  the  lateral  portions,  strongly  and  evenly  convex  ;  punc- 
tures rather  large,  evenly  distributed,  deeply  impressed,  rounded,  distant 
generally  by  less  than  one-half  their  widths  ;  ocular  lines  meeting  at  some- 


f  *.;- 


I       I 


'ii 


1G4 


NORTH    AMERICAN 


wliat  more  than  two  liMigtlis  in  advance  ;  eyes  smnll  ;  antennae  slightly 
longer  than  the  width  of  head,  sleiidor,  basal  joint  Mack,  remainder  dark 
piceouH-hrown,  clnb  distinct  ;  third,  fourth,  and  fifth  joints  nearly  nniforndy 
and  gradually  decniasing  in  length,  eighth  slightly  less  robust  than  the 
seventh,  joints  of  club  of  nearly  e(iual  width  ;  maxillary  palpi  short,  <lark 
piceo-testaeeouH.  Prothorax  widest  at  the  anterior  angles,  where  it  is  sliglitly 
narrower  than  long  and  about  five-sixths  as  wide  as  the  head  ;  'sides  gradu- 
ally convergent  to  the  base  and  strongly  bisinuate  ;  anterior  sinus  just 
behind  the  apical  angles,  much  shorter  than  the  ])osterior  ;  anterior  and 
posterior  margins  equally  and  rather  strongly  arcuate,  the  former  about 
(ine-third  longer ;  anterior  angles  well  marked  :  surface  rather  strongly 
tuberculate  near  each  basal  angle,  transversely  impressed  just  beliind  the 
anterior  margin,  rather  finely  and  evenly  punctate;  punctures  round,  im- 
pressed, generally  distant  l)y  slightly  less  than  their  own  widths  ;  interspaces 
slightly  convex.  Elytra  at  base  about  as  wide  as  the  head;  sides  ft-ebly 
divergent  posteriorly,  nearly  one-third  long(U'  than  the  width  at  base,  feebly 
and  almost  evenly  arcuate  throughout  ;  together  very  broadly,  evenly, 
roundly,  and  somewhat  strongly  emarginate  behind  ;  apical  angles  very 
acute  and  well  marked  ;  surface  somewhat  depressed,  very  strongly  im- 
pressed on  the  suture  throughout  its  length,  each  elytron  also  impressed 
before  the  middle  and  behind  the  middle  exteriorly  ;  punctures  rather 
coarse,  round,  deeply  impressed,  evenly  distributed,  generally  distant  by 
their  own  widths  ;  interspaces  moderately  convex  ;  suture  nearly  one-third 
longer  than  the  pronotum.  Abdominal  segments  decreasing  uniformly  and 
just  visibly  in  width,  first  vt!ry  slightly  wider  than  the  contiguous  elytra, 
strongly  constricted  at  base:  border  nearly  obsolete  except  on  the  first  seg- 
ment, where  it  is  rather  strong  ;■  surface  finely  and  rather  feebly  punctate  ; 
transverst!  carinae  not  cusped,  iri'egularly  toothed  and  coarsely  setose. 
Legs  short,  slender,  piceous-black  ;  first  joint  of  the  posterior  tarsi  as  long 
as  the  next  two  together  ;  fourth  joints  strongly  bilobed,  lobes  slender. 

Male. — Unknown. 

Female.. — Sixth  segment  transversely  and  broadly  truncate  at  tip,  trunca- 
tion very  feebly  bisinUate. 

Length  4.3  nun. 

liritisli  Columbia,  1. 

A  distinct  species,  distinguished  by  the  very  peculiar  form  of  the 
protliorax,  the  prominent  anterior  angles  being  observed  in  no  other 
species  of  the  group  in  our  fauna.  In  the  strong  sjiarse  setae  grow- 
ing from  the  transverse  carinae  of  the  abdomen,  and  in  tlie  general 
character  of  the  surfaces,  it  bears  a  reseml)latice  to  plicipentiis  of 
Vancouver  Island  ;  the  very  long  elytra  and  peculiar  pronotum  will, 
however,  at  once  distinguish  it  from  any  other  species.  . , 


11.  A.  Sayi  n.  sp. — Form  moderately  robust,  somewhat  depressed. 
Pubescence  ratlier  long,  sjiarse,  evenly  distributed,  snb-recuinbent,  coarse, 
cinereous,  absent  from  tiie  middle  portions  of  the  abdominal  segments. 
Surface  of  the  body  shining,  distinctly   and  minutely  reticulated.      Head 


COLEOPTERA. 


1  CU) 


sniiill,  twioc  as  wide  as  lon^s  t'ycs  small,  gcnat;  distinctly  visil)l('  liiOiiinl 
them  ;  iiitt'i'oc'iilar  surface  more  tliau  thrcM^  timt'S  as  \vid<!  as  the  eye,  fccMy 
convex  ;  siilcations  impressed,  rounded  at  tlu^  bottom,  distinct ;  intermediate 
surface  bidadly,  evenly,  and  moderately  convex,  slif;;litly  wider  than  the 
lateral  ])ortions  ;  punctures  minute,  round,  imjjressi'd,  evenly  distril)uted, 
si^jarated  liy  more  than  twice  their  widths  ;  ocular  lines  nu^etinij;  at  about 
thre(^  lengths  in  a<lvanco ;  antennae  rather  short  and  robust,  scarcely  longer 
than  the  width  of  iiead,  dark  piceo-testaceous,  basal  joint  l)lack,  club  sliglitly 
darker;  joints  three,  four,  an''  five  uniformly  and  very  rapidly  decreasing  in 
length,  seventh  and  eighth  ('(jual  in  length,  the  latter  mor(!  robust,  joints  of 
club  small,  very  feebly  coinpri'ssed  ;  maxillary  palpi  sluirt  and  robust,  rather 
l)al(!  j)icco-testaceo\is.  Prothorax  arciiately,  evenly,  and  moderately  rapidly 
increasing  in  width  to  a  jioint  slightly  in  advance  of  the  miildle,  where  it  is 
distinctly  narrower  than  long  and  fiv(>-sixths  as  wide  as  the  head  ;  sides 
thence  rather  more  rapidly  convergent  posteriorly  and  straight  ;  anterior 
margin  slightly  longer  tlian  the  posterior;  somewhat  strongly  arcuate,  the 
latter  nearly  straight  ;  surface  above  nearly  flat,  with  two  feeble  tubercula- 
tions  on  each  side  just  above  the  Hanks  ;  punctui'es  very  small,  impressed, 
very  evenly  distributed,  distant  by  nearly  twice  their  own  widths;  inter- 
spaces rtiit.  Elytra  at  base  just  perceptibly  narrower  than  th(i  head;  sides 
moderately  divergent  posteriorly,  distinctly  longer  than  the  width  at  base, 
straight  to  within  a  very  short  distance  of  the  apices,  where  they  are  feebly 
arcuate  ;  exterior  apical  angles  very  acute  ;  together  broadly  and  somewhat 
strongly  emarginate  behind  ;  suture  nearly  one-third  longer  than  tiie  pro- 
notum ;  surface  rather  depressed,  confusedly,  and  irregularly  undulated 
throughout,  impressed  on  the  suture,  more  broadly  so  toward  the  basi- ; 
punctures  small,  deeply  impressed,  round,  nearly  evenly  distributed,  st^pa- 
rafed  by  twice  their  widths  ;  inters])aces  nearly  flat.  Abdominal  segments 
decreasing  uniformly  and  rather  gradually  in  width,  first  as  wide  as  the 
contiguous  elytra,  feebly  constricted  at  base;  surface  slightly  depressed; 
border  obsolete  except  on  the  first  segment,  where  it  is  very  distinct;  pun(v 
tures  small,  evenly  distributed,  as  large  as  those  of  the  pronotum  and  eiiually 
distant  ;  transverse  carinae  not  cusped.  Legs  short  and  slender,  black,  tarsi 
distinctly  paler  ;  first  joint  of  the  ])osterior  nearly  eciual  in  length  to  the  next 
two  together;  third  and  fourth  joints  strongly  and  nearly  e(|ually  bilobed. 

Male. — Posterior  edges  of  segments  two  to  five  emarginate  in  the  midille 
fifth,  emarginations  rounded,  those  of  second  and  fifth  segments  v(>ry  feeble, 
not  measurable,  not  terininat(!d  laterally  by  pronounced  angulations,  those 
of  the  third  and  fourth  stronger  and  terminated  lateriilly  by  ))rononnced, 
though  rounded  callosities,  contiguous  surfaces  feebly  and  cylindrically  im- 
pressed ;  sixth  segment  broadly  and  ileeply  sinuate  at  apex,  sinus  occupying 
the  entir((  apex,  in  the  form  of  a  broad  triangle  in  which  the  anti'rior  angle 
is  rounded,  and  in  which  the  sides  are  inwardly  curvate,  twice  as  wide  as 
deep  ;  seventh  broadly  and  evenly  roundi^d  at  apex. 

Fimali. — Sixth  segment  very  narrow,  evenly,  and  strongly  rounded  be- 
hind ;  seventh  emarginate  at  tip. 

Length  4.2-.'). 3  mm. 


1 


I 


I!    I 


166 


NOUTII    AMKKICAX 


Ciiliforniii,  10. 

A  reniiirkiible  species,  apparently  quite  local.  It  may  at  first  sij^fjit 
he  confounded  witli  tarsalis  by  the  color  of  the  legs  and  tarsi,  but 
may  be  distinguished  by  its  peculiar  punctuation  and  sexual  ciiarac- 
ters.  It  is  one  of  our  largest  species  in  this  group  of  Stapliylinidae. 
The  geiuie  of  the  liead  being  visible  beiiind  the  eyes,  renders  it  dis- 
tinct from  any  other  occurring  in  our  fauna. 


%\ 


■ft  .■■ 


■f  !/■ 


I   y\ 


12.  A.  amabilis  i».  sp. — Form  somewhat  slender,  siih-cylinilrical. 
Pubescence  sparse,  evenly  distrilmted,  cinereous,  and  inc()nsi)iciious.  Entire 
surfai;e  very  highly  polished.  Head  moderate  in  size,  robust,  not  twice  as 
wide  as  long ;  iiiterocular  surface  one-half  wider  than  the  eye.  Hat ;  suloa- 
tlons  almost  obsolete  ;  intermediate  surface  very  slightly  wider  than  the 
lateral  jxirtions,  very  sparsely  i)unctate  and  very  feebly  convex  ;  lateral 
portions  closely  and  rather  coarsely  punctate  ;  ocular  lines  meeting  at  about 
one  length  in  advance,  almost  exactly  straight ;  antennae  distinctly  longer 
than  the  width  of  head,  slender,  pale  jjiceo-testaceous  throughout,  very  uni- 
form in  color,  club  small  ;  third  joint  about  one-lifth  longer  than  the  fourth, 
fourth,  fifth,  and  sixtli  decreasing  gradually  in  length,  eighth  elongated, 
slightly  mor(;  robust  than  the  seventh,  joints  of  club  slightly  elongated; 
niaxillaiy  pali)i  long  and  sliMider,  jjale  piceo-tcstaceous,  gradually  paler 
toward  l)ase.  Prothorax  arcuately,  evenly,  and  moderately  r,a])idly  increas- 
ing in  width  to  the  middle,  where  it  is  nearly  one-sixth  narrower  than  long  ; 
sides  thence  rather  less  rapidly  convergent  j)osteriorly  and  just  visibly 
sinuate  ;  anterior  margin  slightly  shorter  and  more  arcuate  than  the  poste- 
rior, the  latter  nearly  straight  ;  surface  transversely  and  feebly  impressed 
just  behind  the  apex,  otherwise  evenly  and  rather  strongly  convex  ;  })nnc- 
tures  small,  deeply  iuipressed,  close,  generally  tending  to  coalesce  trans- 
versely. Elytra  at  base  about  as  wide  as  the  Imad  ;  sides  feebly  divergent 
posteriorly,  slightly  longer  than  the  width  at  base,  moderately  arcuate  poste- 
riorly, nearly  straight  toward  the  hunuM'i  ;  together  broadly,  roundly,  and 
very  strongly  emarginate  beliind  ;  suture  about  one-eighth  longer  than  the 
pronotum  ;  surface  rather  convex,  just  visibly  and  very  narrowly  impressed 
on  ihe  suture  to'vard  the  l)ase,  rather  coarsely  and  closely  pijnctate  ;  punc- 
tures deejjly  imi)ressed  and  somewhat  unevenly  distrit)uted,  generally  sepa- 
rated by  their  own  widths  ;  interspaces  very  convex.  First  four  abdominal 
segments  nearly  ecjual  in  width,  and  but  very  slightly  narrower  tlian  the 
contiguous  elytra,  cylindrical,  feebly  constri(!ted  at  base;  border  obsolete; 
punctures  evenly  distributed,  clos((,  deeply  impressed,  equal  in  size  to  those 
of  the  prcuuitum  ;  transvers(>  carinae  obscurely  and  broadly  tricuspid.  Legs 
slender,  pic<'ous-brown  thoughout  without  variation  in  tint;  first  joint  of  the 
posterior  tarsi  much  shorter  than  the  next  two  together  ;  fifth  as  long  as  the 
flr»t  two  tog(?tlier  ;  fourth  joints  strongly  bilobed,  lot)es  long  and  narrow. 

Male. — I'nknown. 

Fi'inah'. — Sixth  ventral  segment  very  broadly  and  evenly  rounded  behind. 

Length  o.(J  nan. 


I  \ 


COI.EOPTERA. 


167 


Delaware,  1. 

Altlioiigh  somewhat  resembling  arculus  Er.,  tliis  species  may  be 
distiimiiisiied  bv  the  slriieture  of  the  antennae  and  tarsi,  as  well  as 
by  the  punctuation  and  general  structure  ol"  tiie  interocular  surface. 


13.  A.  flavicorilis  (Er.). — Form  rather  sl«nder,  very  feebly  dopresaed. 
Pnliesceiice  ratlic^r  sjiarse,  iiioihM'ate  in  Icnt^th,  cinereous,  fine,  more  reeiiin- 
l)(!iit,  and  dense  on  the  abdomen.  Head  laige,  robust,  scarcely  twice  as  wide 
as  long;  interocular  surface  very  ft-ebly  depressed,  three-fourths  wider  than 
the  eye,  rather  finely,  uniformly,  very  closely,  and  deeply  punctate;  punc- 
tures not  coalesciMit,  round  ;  surface  most  deeply  impressed  near  the  eyes, 
gradually  rising  to  the  middle,  which  is  l)roadly  and  rather  feebly  convex  ; 
ocular  lines  meeting  at  three  or  four  lengths  in  advance,  very  feebly  conver- 
gent, nearly  straight  ;  antennae  long,  very  slender,  flavo-testaceous  through- 
out, club  moderate  ;  third  joint  much  more  than  oue-balf  longer  than  the 
fourth,  eighth  much  elongated,  all  translucent  ;  maxillary  palpi  very  long 
and  slender,  piceo-testaceous  throughout.  Pfothorax  arcuately,  evenly,  and 
ratlier  rapidly  increasing  in  width  to  a  point  distinctly  in  advance  of  the 
middle,  where  it  is  nearly  one-eighth  narrower  than  long  and  about  three- 
fourths  as  wide  as  the  head;  sides  thence  rather  strongly  eoiivrergent  poste- 
riorly and  nearly  straight  ;  anterior  and  posterior  margins  nearly  equal  in 
length,  very  feel)ly  and  equally  arcuate  ;  surface  nearly  evenly  convex, 
nearly  evenly,  closely,  finely,  and  deeply  punctate,  nearly  impunctate  in 
the  middle.  Elytra  at  base  slightly  narrower  than  the  head  ;  sides  very 
feebly  divergent  jtosteriorly,  distinctly  longer  than  the  width  at  base,  feebly 
arcuate,  more  strongly  so  ]iost(friorly ;  togethiH-  broadly,  roundly,  and  some- 
what strongly  emarginate  behind  ;  suture  nearly  one-fourth  longcu"  than  the 
pronotum  ;  surface  very  feebly  impressed  on  the  suture  toward  the  base; 
punctures  round,  rather  small,  deeply  impressed,  nearly  evenly  distributed, 
often  distant  by  more  than  twice  their  widths;  interspaces  nearly  flat, 
polished,  finely  reticulated.  First  four  abdominal  segments  equal  in  width, 
distinctly  narrow(!r  than  thi?  contiguous  elytra,  cylindrical,  criistrii^tcd  at  the 
base;  surface  finely,  closely,  and  evenly  punctulate,  nin.;a  more  finely  so 
toward  the  apex  ;  border  obsolete  except  on  the  first  segment ;  transverse 
carinae  not  cusped  ;  the  second  segment  is  perhaps  very  slightly  narrower 
than  the  fourth.  Lsgs  very  robust,  pale  piciio-testaceous,  tips  of  the  poste- 
rior femora  darker,  tips  of  the  tarsal  joints  slightly  darker  ;  first  joint  of  the 
posterior  tarsi  as  long  as  the  next  two  together  ;  fourth  joints  very  strongly 
bilobed,  lobes  robust  ;  coxae  piceous-black. 

ifale. — Posterior  edges  of  the  second,  third,  and  fourth  ventral  segments 
very  feebly  emarginate  in  the  middle  fifth,  emarginations  extremely  feeble, 
rounded,  and  increasing  in  strength  posteriorly,  hiding  nearly  straight  on  the 
second,  and  very  distinctly  curvate  on  the  fourth  ;  fifth  segment  entire  ;  sixth 
deeply  sinuate  at  apex,  sinus  narrower  and  more  acutely  rounded  than  the 
apices,  slightly  deeper  than  wide  ;  seventh  vt  ry  broadly,  roundly,  and  some- 
what strongly  emarginate  at  tip. 


Hi 


•i'B' 


108 


NOHTFI    AMERICAN 


Fimolr. — Head  mnoh  narrower  ;  iiittM'ofnlar  snrfaco  relafivoly  lirnadi-r  ; 
oi'iilar  liiK^s  iiiori'  (•(nivcrgoiit ;  sixth  scjjnu'ut  vury  ohtiisuly  and  broiuily 
rounded  Ixdiind.  , 

Li'nj^Ui  4.(J-4.f?  nun. 

IMicliiffiUi  and  Lake  Supoiior  (various  points),  2  1  ;  Middle  Stutt's, 
4;  Canada,  2;  Cambridjie,  Massacdiusetts,  2. 

A  very  common,  wld(dy  diffused  species ;  the  female  is  much  more 
robust  than  the  male. 


'  i"M: 


14.  A.  annularis  (I'"r.). — Form  rolmst,  sub-cylindrical.  Pubescence 
ratlier  jjlcntilul,  somewliat  louf;,  suli-rccuiiibi'iit  on  tlie  alulouien,  nioiv  sparso 
and  erect  on  tlie  reniainiler  of  the  (h)rsal  surface,  cini'reoiis  ;  entire  liody  very 
hi<,dily  polistied.  Head  moderate,  twice  as  wide  as  long  ;  interocular  surface 
two-tliirds  wider  tiian  tlie  eye,  tint ;  sulcations  rather  feeble,  rounded,  inter- 
ni(!diat(!  surface  nuicb  broader  than  the  lateral  portions,  having  at  its  l)as((  a 
large  imi)uiictate  area;  ])unctnres  moderate  in  size,  closely  and  polygonally 
crowded  ;  ocular  lines  meeting  at  nearly  three  lengths  in  advance;  antennae 
but  slightly  longer  than  the  width  of  head,  slender,  piceous-brown  through- 
out, club  robust;  third  joint  more  than  one-half  longer  than  the  fourth, 
tenth  slightly  broader  than  long;  maxillary  palpi  very  long  and  slender, 
piceo-testaceous  throughout,  translucent.  Prothorax  widest  just  in  advance 
of  the  middle,  when^  it  is  just  ]ierceptibly  narrower  than  long  ;  sides  thence 
arcuate  anteriorly,  feebly  sinuate  posteriorly,  slightly  more  convergent  in  the 
former  direction  ;  anterior  margin  shorter  than  tlie  posterior,  equally  and 
feebly  arcuate  ;  surface  rather  tinely,  very  closely,  and  somewhat  (onfusedly 
punctate,  evenly  convex,  having  in  the  middle  of  the  disk  live  rather  small 
and  irregular  impunctate  spots.  Elytra  at  base  very  .slightly  wider  than  the 
liead  ;  sides  parallel,  equal  in  length  to  the  width  at  base,  strongly  and 
evenly  arcuate  ;  togetht^r  broadly,  roundly,  and  strongly  emarginate  behind  ; 
suture  nearly  one-fourth  longer  than  the  prothorax  ;  surface  of  each  elytron 
very  feebly  tuberculate  near  its  inner  basal  angle,  ])uuctures  round,  rather 
small,  very  deeply  impressed,  nearly  evenly  distril)uted,  generally  distant  by 
slightly  more  than  their  own  widths,  interspaces  very  convex.  Abdominal 
segments  decreasing  scarcely  jierceptibly  in  width,  first  very  slightly  nar- 
rower than  the  contiguous  elytra,  sub-cylindrical  ;  border  obsolete,  except 
on  the  first  segment,  where  it  is  very  evident,  especially  toward  tlie  bas<i : 
suiface  tinely,  closely,  and  evenly  punctulate;  transverst;  carinao  unicuspi<l. 
Legs  ratlier  short  and  robust,  femora  black  at  the  base,  thence  reddish- 
testaceous  to  the  middle,  thence  black  to  the  tips  ;  tibiae  blackish  in  die 
basal  half,  piceous  in  the  distal  half;  tarsi  rather  pale  piceo-testaceous  ;  iirst 
>  joint  of  posterior  tarsi  as  long  as  next  two  together  ;  fourth  joints  very 
strongly  bilobed. 

Ahde. — Sixth  ventral  segment  strongly  sinuate  at  apex,  sinus  narrower 
and  more  acutely  rounded  than  the  apices,  but  slightly  wider  than  deep, 
evenly  and  narrowly  rounded  at  the  bottom  ;  teetli  of  seventh  segment  dis- 
tinct and  acute. 

Female. — Sixth  segment  broadly  angulate  at  tip,  angle  broadly  rounded. 

Length  5.0-5.5  mm. 


COLEOPTKKA. 


169 


Ciimbi'idjrt',  IMiissiiclinsc^tts,  () ;  Nchniskii,  ') ;  Detroit,  ]\Ii('liif,'aii,  1  ; 
Illinois,  1  ;  Soiillicrii  Stiit(!s,  4;  Griinshy,  Oiiturio,  12. 

Tliis  sufH'ic's  is  ptirimps  the  largest  williiii  our  territory,  iiml  one 
of  tlie  iarjiest  of  tiie  ^roiip.  It  is  very  eoniinon  ami  widely  liilliised, 
altlioujili  I  iiave  not  yet  seen  it  from  tiie  i'at'ilie  coast.  Tlie  liiird 
and  fonrtli  ventral  segments  in  the  male  are  very  feebly  emarginate 
in  the  middle  at  the  apices. 

In  many  respects  (iiiiiiihir!s  reseml)l(!s  the  KiM'opean  vtrindrhniles; 
it  difli'rs  fiom  it  in  tlie  relative  width  of  tiie  interocular  surface,  and 
in  iht^  disposition  of  the  red  l)and  about  the.  femora,  liiis  being  nnudi 
|)aler  in  tint,  broader,  and  extending  furtiier  from  tiie  coxae  on  tlie 
latter.  The  elytral  sculptiu-e  is  almost  exactly  similar  in  tiie  two 
species. 


IT).  A.  perforatlis  n.  sp. — Form  ratlior  slender,  sub-cylindrical. 
Pulicsccncc  siiarsf,  seiiii-erect,  irregularly  distributed,  moderate  in  leii;;tli, 
cinereous,  inconspicuous;  entire  surface  extreiut'ly  highly  jioli^lied.  Head 
rather  small,  robust,  much  less  than  twice  as  wide  as  long;  interocular 
surface  nearly  Hat,  scarcely  one-half  wider  than  the  eye ;  sul<;atioiis  rather 
strong;  intermediate  surface  about  equal  in  widtii  to  the  lateral  j)ortioiis, 
evenly  and  strongly  convex,  imjiuiictate  ;  juinctiires  sparse  and  vt-ry  irregu- 
lar in  shape,  indelinitely  coalescent  in  tlie  sulcations  ;  ocular  lines  meeting 
at  more  than  one  length  in  advance  ;  antennae  longer  than  the  widtli  of  head, 
nnifoinily  jiale  i)iceoiis-liii)wn,  except  the  ilub  which  is  dai-kcr,  the  latter 
nuMlerate  in  size  ;  third  joint  very  luucli  elongated,  three-fcuirtlis  longer  than 
the  fourth,  eighth  more  robust  than  the  seventh,  joints  of  club  <'loiigated  ; 
maxillary  palpi  very  long,  tiavate  throughout.  Prothorax  widest  at  onivthird 
its  length  from  the  apex,  where  it  is  much  narroiver  than  long;  sides  nearly 
parallel,  rather  strongly  and  evenly  arcuate  from  the  apical  angles  to  a  point 
slightly  beliind  the  middh^,  thence  very  fetdily  convergent  jiosteriorly  and 
ratlitM'  strongly  sinuate,  arcuate  at  the  basal  angles;  anterior  and  posterior 
margins  equal  in  length,  equally  and  moderately  arcuate,  nearly  equal  in 
length  to  the  extreme  width  of  the  pronotuin  ;  surface  (ivenly  convex,  sparsely, 
very  irregularly  and  strongly  punctate,  a  fusiform  sjjace  in  the  middU!  of  the 
disk  impunctate  ;  interspaces  convex.  Elytra  at  base  distinctly  wider  than 
the  head;  sides  rather  feebly  divergent  posteriorly,  about  equal  in  length  to 
the  widtli  at  base,  strongly  and  evenly  arcuate;  together  broadly,  roundly, 
and  rather  strongly  emarginate  behiinl  ;  suture  very  slightly  longer  than  the 
pronotum  ;  surface  very  coarsely,  deeply,  sparsely,  and  irregularly  punctate, 
a  large  irregular  space  near  the  middle  of  each  elytron  impunctate  ;  punc- 
tures rounded  ;  interspaces  convex.  Abdominal  segments  decreasing  scarcely 
perceptibly  in  width,  first  much  narrower  than  the  contiguous  elytra,  nijarly 
cylindrical,  each  segment  strongly  constricted  at  its  base;  border  obsolete ; 
surface  very  sparsely,  finely,  and  irregularly  punctulate  ;  transverse  carinae 
very  rudimentarily  tricuspid.    Legs  slender,  rather  long,  piceo-fuscous,  tarsi 


I 


170 


NORTH    AMKIIICAN 


■ft 

':h  I': 


I: 


and  bast'H  of  the  tiblno  paler ;  first  joint  of  tin-  posterior  tftrsi  aa  long  as  the 
next  tlu'i'c  toRotlit-r ;   foiirtli  joints  narrowly  l)il()lM'(l,  lolws  long. 

A/ale, — Unknown. 

Frimilf. — .Sixth  vt-ntral  sfgrnunt  very,  narrow,  obtusely  roundtMl  bchinfl. 

L(*n<'tli  4.1  miu. 


Arizona  (Morrison),  2. 

Tlic  entire  sinface  of  tlie  body  is  of  an  inten.se  hlauk,  and  is  very 
highly  polisluHl.  Tiie  very  s|)ars<',  coarse,  deep  pinurtiiation,  taki'ii 
ill  eonjiinetion  with  tlie  cyliii<Iriral  form  of  tiie  protliora.x,  and  the 
peculiar  structure  of  the  head,  will  render  tliis  species  easily  recogni- 
zable. 

10.  A.  Ilitescens  n.  sp, — Form  rather  slemler,  sub-cylindrical.  Pubes- 
cence extremely  sparse,  seiiii-ereot,  cinereous,  inconspicuous.  Hody  extremely 
hi>,'bly  polished.  Head  moderate  or  small,  nearly  twiee  as  wide  as  long; 
interoenlar  surface  tlat,  very  feel)ly  and  irri-gnlarly  convex  in  tiie  middle, 
where  it  is  almost  impunctate  ;  sulcaticms  ol)solete  ;  punctures  moderate  in 
.size,  round,  deeidy  impressed,  very  clos»»  toward  tlie  eyes;  ocular  )ines  meet- 
ing at  slightly  more  tlian  two  lengths  in  advance  ;  su])i'a-anteunal  tul)ercu- 
lations  ])rominent,  elongated,  impunctate  ;  surface  between  them  confusedly 
rugulose  ;  antennae  short,  scarcely  as  long  as  the  widtli  of  head,  somewhat 
slender,  very  dark  jiiceous,  basal  joint  somewhat  paler,  club  UKnlerate  ;  third 
joint  one-h;ilf  longer  than  the  fourth,  eighth  more  rolmst  than  tlie  seventli, 
joints  of  club  slightly  elongati'd  ;  maxillary  i>alpi  rather  robust,  dark  piceo- 
testaceoHS  throughout.  Prothorax  arcuately,  evenly,  and  rapidly  increasing 
in  width  to  the  middle,  where  it  is  distinctly  narrower  tlian  long  ;  sides  thence 
ratlier  less  strongly  convergent  jiosteriorly  and  very  feebly  sinuate;  anterior 
margin  very  slightly  longer  than  the  posterior,  eiiually  and  rather  feebly 
arcuate;  surface  strongly  convex  ;  punctures  rather  large,  deeply  impressed, 
round,  rather  irregularly  distributed  ;  a  narrow  fusifoiiu  space  in  the  middle 
imjiunctate.  Elytra  at  base  about  equal  in  width  to  the  head;  sides  very 
feebly  divergent  posteriorly,  slightly  longer  than  the  width  at  base,  nearly 
straight  near  the  humeri,  strongly  arcuate  i)nsteriovly  ;  together  broadly, 
somewhat  angularly  and  strongly  emarginate  behind  ;  suture  alwut  one-sixth 
longer  than  the  pronotum  ;  surface  very  strongly  convex,  feebly  and  narrowly 
impressed  on  the  suture  toward  the  base  ;  punctures  rather  large,  round, 
very  deei)ly  impressed,  evenly  distributed,  generally  distant  by  more  than 
their  own  widths  ;  interspaces  convex.  Abdominal  segments  decreasing 
uniformly  and  rather  rapidly  in  width,  first  distinctly  narrower  than  the  con- 
tiguous elytra,  cylindrical,  feebly  constricted  at  b.'iso  ;  border  obsolete,  except 
at  the  base  of  the  first  segment,  where  it  is  very  narrow  ;  .surface  deeply 
punctured  ;  punctures  round,  nearly  as  large  as  those  of  the  pronotum, 
evenly  distributed,  distant  by  more  than  their  own  widths  ;  transverso 
carinae  not  cusped.  Legs  slender,  piceous-black,  basal  extremities  of  the 
tibiae  piceo-testaceous,  tarsi  rather  slender  ;  first  joint  of  the  posterior 
slightly  longer  than  the  next  two  together. 

Malt'. — Posterior  edge  of  the  fifth  ventral  segment  just  perceptibly  and 
narrowly  emarginate  in  the  middle ;  sixth  narrow,  truncate  at  tip,  lateral 


COLEOITEKA. 


171 


anKl«'H  rounded,  niicCdlo  of  truncation  HomotirneH  jn»t  perwptilMy  ttinuntu  ; 
turutinnl  twtae  of  sevontli  Hoginont  vary  loiin  and  Hlrong. 

Fimiile. — >Sixt  i  H»>giu)'ikt  roundvd  behind  at  tht>  iunukxlinto  a\mx,  tatvral 
portions  of  tip  f(ti>l>ly  Hiniiate. 

Length  3.G-4.0  luiu. 

Floridii,  (3. 

In  tills  spci'ie.s  th«'  sexnnl  ohnrnrtPrs  b«'('r>m»t  v<'ry  ('••<d)l<';  it  can  h»! 
distin^nisliiMl  from  citl/osns  Er.  by  tlli^t  elmructt'r,  us  well  uti  by  the 
dark  U'gs,  iinlciinut',  and  palpi.  . 

17.  A,  pollens  n.  sp. — Form  ratlier  robust.  Pnbescence  inoder.'ite  iu 
lengtli,  dense,  coarse,  c-onspicuons,  cinereous.  Head  robust,  twice  as  wide 
as  loll};  ;  labruiu  very  ]>roiiiiiient ;  iiitcrorular  siirfaec  two  and  one-lialf  times 
as  wide  as  tike  eye,  fet^lilv  eoiivex  ;  suleations  somewliat  feebly  roitmied,  ink- 
pressed  ;  interntedinte  surface  much  wider  tlian  tlie  lateral  ix)rtir>iis,  rather 
str()iif,'ly  and  evenly  «>nvex  ;  i>mictures  round,  evenly  distributed,  rather 
Hiiiall,  distant  by  tlieir  own  widtlis  ;  ocular  lines  meetini;  at  nearly  three 
lengths  in  advance;  antennae  rather  short  and  robust,  as  long  as  the  width 
of  lii^ad,  pale  brownisb-testawjous,  basal  joint  nearly  black,  club  just  visibly 
darker,  moderate  in  siae;  third  joint  two-tliirds  longer  than  the  fourth,  as 
long  <ts  the  next  two  t()geth<u',  eight  to  eleven  grailually  increasing  in  thick- 
ness ;  maxillary  palpi  robust,  rather  long,  ilark  piceo-testaceous  throngliout, 
third  joint  infuscate  toward  tip,  second  twice  as  long  and  thick  as  the  first. 
Prothorax  widest  in  the  middle;  sides  thence  etiually  and  nuxb-rately  con- 
vergent anteriorly  and  posteriorly,  slightly  arcuate  in  the  former,  nearly 
straight  in  the  latter  direction  ;  anterior  and  posterior  margins  etjual  in 
l(;ngth,  the  former  slightly  arcuate,  the  latter  nearly  straight  ;  surface 
strongly  swollen  at  a  short  distance  from  each  basal  aiigbf,  also  very  feebly 
swollen  a  little  in  advance  of  the  niidiUe  at  eadi  side  ;  punctures  ronntled, 
small,  feebly  impressed,  somewhat  unevenly  distributed,  generally  distant 
by  a  little  less  than  their  own  widths,  slightly  conlesceiit  towanl  the  base  ; 
interspaces  Hat,  polished,  grfiyish-black.  Elytra  at  base  as  wide  as  the  head  ; 
sides  feebly  divergent  posteriorly,  longer  than  the  width  at  base,  straight  to 
within  a  very  short  distance  of  the  apices,  where  they  are  feebly  arcuate  ; 
together  rather  broadly,  roundly,  somewhat  feebly  emarginate  behind  ;  in- 
ternal edges  of  the  elytra  slightly  divergent  at  the  apices;  suture  nearly 
one-half  longer  than  the  pronotum  ;  surface  depressed,  rather  broadly  and 
strongly  impressed  along  the  suture,  more  widely  so  at  the  l>ase  ;  also  longi- 
tudinally and  feebly  impressed  near  each  humeral  angle  ;  punctures  mode- 
rately coarse,  deeply  impressed,  evenly  distributed,  distant  by  two-thirds 
their  own  widths;  interspaces  feebly  convex,  shining,  grayish-black,  minutely 
reticulated.  Abdomen  very  jiromineiit,  segments  diminishing  just  visibly 
and  evenly  in  width  to  the  fifth,  sixth  narrower,  all  nearly  cylindrical, 
bor(b>r  ol)Solete  (;xcept  on  the  first :  surface  polish(>d,  minutely,  sparsely,  and 
evenly  punctulate ;  transverse  caiinae  not  cusped,  ciliate;  cilia  alwent  from 
a  small  space  in  the  middle  of  each.  Legs  rather  short  and  slender,  black, 
tarsi  piceons-black  ;  first  joint  of  the  jiosterior  much  shorter  than  the  last, 
scarcely  as  long  as  the  next  two  together  ;  third  joints  less  strongly  bilubed 
than  the  fourth.  ,      '       '         " 


:ii 


nr^ 


172 


NORTH    AMKIMCAN 


Af(ilp.—PmU'Y\nr  (•(!}{«  of  tliH  third  ventral  f<i'(;iii('iit  just  vinilily  i-iuar^'tniiti^ 
In  the  niiddlc  sixth,  i-ii);ir;;iiiiition  <tv«nly  nmiidi'd,  not  tnt'dHiirulilc,  contifjii- 
onn  ccljic  <listini-tly  ;ind  niirrowly  lii'Vtdcd  ;  foiirtli  scfiiiii'iU  fnwir^'inati-  in  thH 
middle  sixth  (it  iipt'x,  eniarj^ination  roumh'd,  ti-ii  t<>  twelve  times  as  wiilo  m 
dt't'p,  terminated  laterally  liy  I'cinnded  |)n)minen(.'es,  eonti^jnons  surfaetf  im- 
pressed for  a  short  distaii<:e  anteriorly;  lifth  scarcely  perc'eptihly  modilied  ; 
Bixth  deeply  and  hroadly  incised  at  apex,  incisure  occnpyin};  nearly  the 
entire  tip,  anterior  anyie  narrowly  rounded,  siih's  strai<,'ht.  alioiit  twice  iis 
wide  as  deep;  Hcveiitii  sej;ment  very  large  and  prominent,  roundeil  hehind, 
lateral  H])innuH  H<ttae  Hhort  and  rohiint. 

FiiiKilv. — Sixth  se;;inent  rather  narrow,  acutely  annulate  at  apex,  sides  of 
angle  nearly  slrai;,'ht ;  seventh  rather  narrow,  hilolied  at  tip.  Third  tarsal 
joints  almost  as  strongly  liilohetl  as  the  I'ourtli.  Posterior  femoia  not  as 
irregularly  swollen  in  the  niiildle  as  in  the  mal«  ;  smaller  in  size. 

Length  4.1  J-.').^  %  una. 

Teiiiiio,  Wasliiiifiton  Territory,  4;  Caliroriiiu,  1. 

'V\\ii  s|)(!cinK*n  from  Caliloriiiu  iijjreea  very  .!  witli  tlic  male 
from  Ti'iiiiio,  Init  lias  tli(^  tarsi  and  palpi  pah-r,  and  th<'  (irili  scj;in<'iit 
l)roa<liy,  roundly,  and  (|iiiff  iipprcciahly  <'marj;inat('  iHdiiiid  ;  tin-  in- 
cisure of  llie  sixth  sciriiK'Ht  is  siiy;hlly  sinaMor  hut  similarly  sliap('(l. 

Tlic  \i'ry  large  seventh  sefinitMit  in  tins  inah',  ami  the  liicat  dis- 
jiiirity  in  tlic  sizes  of  tlie  male  ami  fennile.  as  well  as  the  very  large 
Jind  prominent  abdonnMi,  in  wiiich  tlic  tii^  M'irment  is  as  wide  as  the 
eontijiiioiis  elytra,  are  (listiiij^uishiiig  features  of  tiiis  species.  It  must 
be  considered  in  some  respects  as  one  of  the  aberrant  species  of  the 
genus. 

Tli(f  tarsal  claw  is  figured  on  the  plate,  fig.  1(1. 


\\\ 


\^.  A.  patens  n.  sp. — Form  as  in  iiolhmx.  Pubescence  moderate  in 
length,  dense,  semi-erect,  coarse,  cinereous,  conspicuous.  Head  roliiist, 
scarcely  twice  as  wide  as  long;  labrum  vfvy  prominent  and  broail  ;  inter- 
ocular  surface  two  and  one-half  times  us  wide  as  the  eye,  moderately  convt^x  ; 
siilcations  narrow  and  rather  feehle ;  intermediate  surface  broadly  convex  ; 
puiKttures  rather  large,  deeply  impressed,  round,  distant  by  much  less  than 
their  own  widths  in  the  convex  portions,  confused  in  tin'  sulcations  ;  ocular 
lines  very  convergent,  met^ting  at  less  than  one-half  a  length  in  front  of  the 
labrum  ;  antennae  short  and  robust,  scarcely  longer  than  the  width  of  head, 
basal  joint  black,  remainder  dark  brownish-testaceous,  club  slightly  darker; 
third  joint  one-half  longer  than  the  fourth,  not  as  long  as  the  next  two 
together,  seventh  much  longer  and  slightly  more  robust  than  the  eiiihth, 
tenth  more  robust  than  the  eleventh  ;  maxillary  palpi  short,  very  robust, 
basal  joint  rather  slender,  testaceous,  second  and  third  dark  piceous,  second 
joint  slightly  bent,  flattened.  Prothorax  di'^tinctly  longer  tlianwidt?;  base 
and  apex  equal  in  length,  nearly  transverse  ;  sides  arcuate,  most  strongly 
so  jnst  behind  the  apical  angles,  nearly  straight  toward  the  base;  surface 
obliquely  tuberculate  near  each  basal  angle,  very  feebly  swollen  on  each  side 


COt.KOI'TEKA. 


173 


jii!<t  ill  fiilvaiicf  of  the  iiiiilillf;  punrtiin's  iiindfratcly  iiiiprt'NNcfl,  r<)iiii(l*-(l, 
very  uloMt*,  Hoint-whnt  coiiriiHfil.  Elytra  at  1>as*i  nli^'htly  wi<lfr  tliiiii  tlio  lioail ; 
wiflt's  vi'i'y  ^*li^,'lltly  (livcrnfiil  |i(islfiiiirly,  iiiiirli  Inii^f-r  tliaii  tin-  wiiltli  at  liaMc, 
Very  ffflily  arfiiatti ;  tiij,'i'tli»M-  linwidly,  roiimlly,  ami  r.'itlicr  li'i-lily  <-iiiar){iiiatu 
Imhiiiil :  xiitiirc  nearly  oiic-lialf  Idii^ftr  fjian  thf  iiroiiotiim :  Hiirfart)  Htrongly 
nixl  Hiiiiii'U'liat  unevenly  |iiinrtat<> ;  puin'tnit'S  roiiiHl,  catlifr  dt-fply  im- 
jii'i'SfttMl,  Hciiiicwliat  cloHc  ;  iiiti'i'.s|(»rt'n  'arly  llat,  iiiiiiiiti-ly  itHiciilattMl. 
First  four  nliilDiniiial  Mf^jnu-ntH  decnvwinj;  Hcarctdy  pcrci-ptibly  in  witltli, 
lirst  as  widi"  ha  tlic  (.■oiitinuou.s  tdytrn,  Hiili-cyliiidricnl ;  liordcr  appan-nt  on 
tlif  llirtt  only  ;  tranHViTMo  cariiiai!  very  (disciiicly  fiirt|itMl  in  the  middle,  wliere 
tliey  are  more  free  fi-om  jjiilieneenee  tliiiii  laterally  ;  Hiirface  rather  elortoly, 
evenly,  and  very  Htroiif^ly  piinetiilate  ;  piinetiireH  nearly  as  larjje  an  tlioHu  of 
Iho  elytra.  Legs  short  ami  rather  .^lender,  lilaik,  tarsi  very  dark  piceou.s- 
brown  ;  first  threi'  joints  of  tliti  posterior  almost  nniroruily  decreasing  in 
length  ;  all  the  joints  very  densely  pnheiicent  beneath. 

Miilr. — I'nknown. 

l-'iiiiiilr. — Sixth  vi'iitral  segment  hmg,  rather  narrow,  ra]d(lly  becoming 
narrower  posteriorly  throughout  its  length,  narrowly  rounded  at  the  lip, 
Hurface  having  a  broadly  rounded,  rather  feeble  canaliuulatiun  traversing 
imarly  its  i-ntire  length  ;  Heveiith  Hugnient  bilobed  at  tip. 

Length  .').('  nun. 

Alamosa,  Colonulo,  1. 

This  .species  greatly  resembles  pollens,  but  differs  specifically  in  tlie 
strncliire  of  the  palpi  and  sixth  ventral  segment,  also  most  decidedly 
in  the  stronger  punctuation  of  the  abdomen  above  and  beneath. 


f 


t 


19.  A.  recoiKlitllS  n.  sp. — Form  robust,  slightly  depressed.  I'ubes- 
cenee  ratliei'  olose,  evenly  distributed,  semi-erei;t,  short,  cinereous,  somewhat 
conspicuous.  Head  rather  small,  robust,  not  twice  as  wide  as  long;  inter- 
oeular  surface  slightly  convex,  slightly  more  than  twice  as  wide  as  the  eye ; 
sulfations  broadly  rounded,  feeble;  intermediate  surface  evenly  and  mode- 
rately convex,  slightly  wider  than  the  lateral  portions  ;  ]>unctures  small, 
round,  deeply  impressed,  evenly  distributed  and  very  close,  separated  gener- 
ally by  less  than  one-half  their  own  widths  :  ocular  lines  meeting  at  two 
lengths  in  advance;  antennae  slightly  longer  than  the  width  of  head,  rather 
robust ;  basal  joint  black,  second  joint  and  funicle  pale  testaceous,  club 
castaneoiis,  larg(!  ;  third  joint  one-half  longer  thaw  the  fourth,  joints  six 
seven,  and  eight  decreasing  in  length,  the  latter  more  robust,  joints  of  duo 
slightly  elongate,  last  two  much  larger  than  the  ninth  ;  maxillary  j)alpi 
piceo-tesf;u'eous,  paler  toward  the  base,  infuscate  toward  the  apex.  Pro- 
thorax  arciiately,  evenly,  and  very  gradually  increasing  in  width  to  a  point 
slightly  behind  the  middle,  where  it  is  slightly  narrower  than  long;  sides 
thence  more  rapidly  convergent  posteriorly  and  distinctly  sinuate;  posterior 
margin  slightly  longer  than  the  anterior,  nearly  straight,  the  latter  very 
feebly  ar<'uat(! ;  surface  feebly  and  distantly  tuberculate  at  the  base,  other- 
wise very  evenly  convex  ;  punctures  very  tine,  deep,  round,  close,  and  evenly 
distributed  ;   interspaces  one-third  as  wide  as  the  punctures,  acutely  convex, 


174 


NORTH    AMEKICAN 


f  ;■' 


sliininp;,  grayish-blapk.  Elytra  at,  haso  as  widtA  as  or  just  pi^rceptJIAy  wider 
than  th<-'  iK'ad  ;  sidos  nearly  jiarallel,  lonpT  than  the  width  at  base,  f<*td)ly 
artniate,  slightly  iiior«  strongly  so  postt'i-iorly ;  togi^ther  broadly,  roundly, 
and  somewhat  feebly  eniarginate  behind  ;  suture  one-third  longer  than  the 
jtrouotnni ;  surface  very  tWd)ly  impressed  on  the  sutdre  toward  th<'  base  ; 
punetures  mui-h  larger  than  those  of  ])ronotiim,  deeply  im)>ressed,  sonle^vhat 
polygonal  or  round<?d,  nvarly  evenly  distributed,  usually  dintant  \»y  one,-lialf 
their  widths  ;  interspaces  moderately  convex,  finely  reticulated,  shining, 
grayish-bla<k.  Abdominal  segnx'iits  decreasing  uniformly  and  mo(b-rately  in 
width,  first  slightly  narrower  than  the  contiguous  elytra,  neaily  oylin<lrical, 
'whly  const rict<'d  at  base  ;  border  obsolete,  except  on  the  first  <egnient,  where 
it  is  distinct ;  surfa<-e  very  closely,  deeply,  and  evenly  punctrlate  ;  imnctures 
as  largo  as  those  of  the  pronotuui.  Legs  moderate,  black,  tarsi  paler  ;  joints 
two  to  four  strongly  biloln-d,  spongy  beneath. 

Mfih. — Sixth  ventral  segment  broadly  and  strongly  sinuate  at  tip,  sinus 
occupying  the  entire  apex,  in  the  form  of  a  triangular  incisure,  with  the 
angle  broadly  rounded,  about  twice  as  wide  as  deep ;  seventh  broadly 
rounded  at  tip,  lateral  setae  strong. 

FciHdlc. — Sixth  segment  acutely  rounded  at  the  middle  of  the  apex,  lateral 
portions  of  apex  feebly  sinuato.     Abdominal  segments  much  more  robust. 

Length  3.9-  x.6  mm. 

Cambridge,  MiU'sachusetts,  fi9;   Lake  Superior,  2;  Iowa,  1. 

This  s[)ecies  differs  from  tarsalia  Ljiingii  in  tiie  emarginatioii  ot 
the  elytra  behind,  whicii  is  very  much  stronger  in  the  European 
species.  They  also  differ  in  the  structure  of  the  tarsal  claws,  as  may 
be  seen  from  the  plate. 

20.  A.  propinqnilS  n.  sp. — Form  rather  slender.  Puliescence  short, 
•^venly  distributed,  somewhat  sparse,  cinereous,  not  conspicuous  ;  surfaces 
polished,  deep  black:  Head  rather  small,  slightly  more  than  twice  as  wide 
as  long ;  interocular  surface  feebly  convex,  thive  times  as  wide  as  the  eye ; 
sulcations  very  feeble,  short,  almost  obsolete;  intermediate  surface  much 
wider  than  the  lateral  portions,  broadly  and  evenly  convex  ;  punctures 
coarse,  round,  evenly  distributed,  very  deep,  distant  by  slightly  more  than 
one-half  their  own  widths  ;  ocnilar  lines  rfieeting  at  more  than  two  h  .igths 
in  advan«x' ;  antennae  short  and  robust,  scarcely  as  long  as  the  width  of 
head,  basal  joint  black?  remainder  brownish-testaceous,  club  not  prominent, 
scarcely  darker;  third  joint  three-fourths  longer  than  the  fourth,  fourth  and 
fifth  equal  in  length,  seventh  longer  than  t''  eighth,  almost  equally  n>bust, 
tenth  much  the  most  robust,  terminal  joint  much  ■nailer  and  slightly 
shortek  than  the  tenth  ;  niaxiliary  pal'ii  very  short  and  robust,  very  dark 
piceous,  slightly  paler  at  the  basu,  third  joint  sti-ongly  flattened.  Prothorax 
areuately  and  very  gradually  increasing  in  width  for  two-thirds  the  length 
posteriorly,  where  it  is  much  nari-ower  than  long,  and  three-fourths  as  wide 
as  the  elj  vra  at  base  ;  sides  thence  rattier  mon^  rapiilly  wmvergent  posteriorly 
and  distinctly  sinuate  ;  anterior  margin  slightly  longer  than  tlve  posterior, 
equally  and  very  feebly  arcuate ;  surface  feebly  tuberculate  near  each  basal 


COLEOPTERA. 


175 


H 


angle ;  punctures  rather  coarse,  round,  evenly  distributed,  very  deeply 
impressed,  distant  generally  by  less  than  one-half  'lieir  own  widths  ;  inter- 
spa'cs  t'et'bly  convex.  Elytra  at  base  about  as  wide  as  the  head  ;  sides  very 
fe<'bly  divergent  posteriorly,  nnicli  longer  than  the  width  at  base,  feebly 
arunate,  very  slightly  more  strongly  so  toward  the  apices  ;  together  broadly, 
roundly,  and  rather  feebly  «'marginate  behind  ;  suture  on«'-third  longer  than 
the  pronotuni  ;  surface  feebly  impressed  along  the  suture,  niuuh  more  liroadly 
and  strongly  so  toward  tlie  base  ;  punctures  large,  round,  very  deeply 
impresseii,  nearly  evenly  distributed,  distant  by  nearly  their  own  widths  ; 
interspaces  feebly  convex,  scarcely  visibly  reticulatevi.  Abdominal  segments 
decreasing  uniformly  and  rather  gradually  in  width,  first  a«  wide  as  the  con- 
tiguous elytra,  cylindrical  ;  Iwrder  rather  strong  on  the  first,  nearly  obsolete 
on  the  remainder;  surfact?  coarsely,  closely,  evenly,  and  very  deeply  jiunc- 
tate ;  ))unctures  is  large  as  those  of  the  pronotum,  but  more  distant  ;  trans- 
v<-i-se  carinae  tricuspid,  cusps  l)econiing  very  obscure  and  indefinite  licyoiul 
the  second  segment.  Legs  short  and  slender,  black,  tarsi  dark  ]ii<M'ous- 
brown  ;  fii-st  three  joints  of  the  posterior  decreasing  nearly  uniformly  and 
rather  gradually  in  b-ngtli,  first  shorter  than  the  last  ;  fourth  joints  very 
strongly  bilolted,  third  h'sti  stixmgly  so;  all  densely,  and  in  part  spongy- 
pulx'scent  beneath. 

Male, — Unknown. 

Female. — Sixth  ventral  segment  rather  narrow,  sides  nearly  straight,  rather 
rajiidly  (■onvergent  toward  apex,  the  latter  strongly  angulate,  sides  about  the 
angle  nearly  straight. 

Length  4.2  mm. 

New.  Hampsliire,  1. 

Easilj'  distinguished  from  recovdifns — a  very  common  species  about 
Boston,  Massjiciiusetts — by  its  narrower  form,  smaller  bead,  coarser 
and  more  distant  elytnil  punctuation,  and  more  intensely  black  integu- 
ments, 

Tbe  tarsal  claw  is  seen  from  the  figure  to  approach  in  general  out- 
line that  of  reconditus,  but  lias  the  tip  more  acute  and  farther  pro- 
longed. 

The  figures  of  the  claws  drawn  on  the  plate  are  merely  intended  to 
give  the  outline  when  viewed  in  prolongation  of  the  axis  of  the  last 
tarsal  joint,  and  arc  not  drawn  'o  any  scale,  so  that  the  relative  sizes 
of  the  figures  are  not  the  same  as  those  of  the  claws  froi.j  which  they 
were  taken. 


21.  A.  canadensis  n.  sp. — Form  moderately  robust.  Pubescence  rather 
short  and  dense,  semi -erect,  evenly  distributed,  cinereous,  rather  coarse  and 
conspicuous.  Head  inwlerate  in  size,  robust,  twice  as  wide  as  long;  labrum 
larg<! ;  interocular  surface  feebly  convex,  more  than  two  and  one-half  times 
as  wide  as  the  eye  ;  sulcations  almost  obsolete  ;  intermediate  surface  broadly 
and  feebly  convex;  punctures  ra*hei  .nail,  round,  very  deep,  evenly  dis- 
tributeil  except  in  the  sulcatio)       where  they  we  more  closely  crowded, 


ii 


]7r. 


NORTH    AMKKICAN 


gciu'rally  distiint  by  It-ss  tliaii  uiK^-liiilf  tlii'ir  wiiltlis  ;  intei-Hpat'cs  very  I'lU'bly 
co'iivcx  ;  (iciilar  lines  nu-etiiig  at  two  Iciifjtlis  in  advance;  antennae  rather 
sli'nilcr,  as  long  as  i\u:  widtli  (if  licad,  liasai  j<iint  lda<-k,  leniainder  dark 
liidwiiisli-ti'.staceons,  clnb  distinctly  darker ;  thiid  joint  sligiitly  more  tlian 
one-liair  longer  tiian  the  fourth,  seventli  niucii  longer  an<l  sligJitly  less 
r(duist  than  the  eighth,  joints  of  eliib  roluist :  inaxillai'>  ]iali>i  long,  joints 
one  and  two  sli'nder,  the  former  tlavate,  the  latter  slightly  darker,  testaceous, 
third  joint  slen<lei'  at  base,  becoming  strongly  enlarged  toward  the  tip,  dark 
eastaneons  toward  the  apex.  Prolhorax  widest  distinct!;' behind  the  middle, 
wiieri-  it  is  slightly  narrower  than  long;  sides  thence  vt-ry  feebly  convergent 
and  s(>nie\hat  unevenly  arcnatt^  anteriorly,  more  rapidly  c<nivergent  and 
feebly  sinn  ite  posteriorly  ;  anterior  margin  longer  than  the  posterior,  e<inally 
and  very  f<  ebly  arcuate;  surface  nearly  evenly  convex  thi'ougho'it,  rather 
coarsely,  very  closcdy,  deeply,  and  somewhat  unevenly  punctate;  punctures 
round,  gei|erally  distant  by  oiu'-half  their  widths.  Elytra  at  base  about 
equal  in  wi<ltli  to  ilw  head;  sides  ratluM-  feebly  divergent  posteriorly,  dis- 
tinctly longer  tl'an  the  width  at  base,  nearly  straight  to  within  a  vi-ry  short 
distance  of  tin*  apices,  where  they  are  feebly  arcuate  ;  together  broadly, 
somewhat  angularly  and  feebly  emarginate  behinil  ;  surface  rather  depressed, 
broadly  and  feidily  impressed  on  the  suture  towai'd  the  base,  coarsely  and 
somewhat  loosely  jiunctate  ;  punctures  round,  deeply  impressed,  nearly 
evenly  distributed,  distant  by  nearly  their  own  widths  ;  interspaces  I'ailier 
convex,  iiolislied,  deep  black,  scarcely  visibly  reticulated.  Abdominal  seg- 
ments decreasing  uniforndy  and  very  gradually  in  widtli,  first  as  wide  as  the 
contiguous  elytra,  nearly  cylindrical  after  the  first  ;  bonb^r  nearly  obsolete 
except  on  the  first  segment ;  surface  (b;eply,  closely,  rather  coarsely,  and 
evenly  punctate  ;  punctures  very  deeply  impressed,  as  large  as  those  of  the 
jironotum  ;  transverse  carinae  indetinitely  cusped  in  the  middle.  Legs  short 
and  sb'nder,  black,  tarsi  pale  brownish  :  first  joint  of  tlie  ])osterior  not  as 
long  as  the  next  two  together,  distinctly  shorter  than  the  last ;  fourth  joints 
very  strongly  bilobed,  third  very  deeply  emarginate  at  tip. 

Mall'. — Unknown. 

Female. — Sixth  ventral  segment  very  long,  narrowly  and  obtusely  rounded 
at  tlie  immediate  apex,  sides  thence  widely  divergent  and  t'etdily  sinuate  to 
the  lateral  edges  of  the  segment;  seventh  segment  narrowly  and  deeply 
bilobed  at  tip. 

Length  5.0  mm. 

(Jrimsl»y,  Ontario,  4;  Nortliern  Illinois,  1. 

Tiio  tiirsi  of  tlie  specimen  from  Illinois  are  mneli  more  densely  and 
coarsely  hirsute,  and  the  seventh  sc<|;inent  is  more  deeply  bilobed  at 
tip  llian  in  those  from  Ontario, 

Tlie  above-described  species  resembles  pollens  from  AVasl  vigton 
'IVrritory  in  general  iippearance  and  size,  but  in  scarcely  any  other 
feature;  the  punctuation  is  very  much  coarser  and  more  sparsely  dis- 
Iribnted  on  the  elytra,  and  is  much  more  dense,  deep,  and  prominent 
on  the  abdomen. 


COLEOPTERA. 


177 


The  tarsal  claw  fi;j;iire(l  on  (he  plate  resembles  in  general  outline 
that  of  ])ro/>i>if/uus,  but  is  much  thick(!r  and  siiorter,  especially 
toward  the  tip. 


'  rouTiiled 
imiiitc  to 
1(1  deeply 


22.  A.  pillgUiH  11.  sp. — Konii  very  rolmnt.  Pubescence  short,  semi-ereot. 
evenly  {listril>iit(Ml,  rather  dense  and  moderately  consiiieiious,  cinereous. 
Head  siii.ill,  twice  as  widens  long;  interocular  surface  very  IVeldy  convex, 
two  and  one-hair  times  as  wide  as  tin;  eye;  sulcations  very  feeble;  inter- 
mediate surface  broadly  and  evenly  (^)iivex  ;  punctures  rather  large,  round, 
dee[)ly  imju'essed,  evenly  distributed,  very  close  but  not  coalesceiit  :  inter- 
sj)aces  nearly  acute;  ocular  lines  meeting  at  more  than  two  lengths  in 
iidvance;  antennae  ratlier  short  and  robust,  as  long  as  the  width  of  iiead, 
basal  joint  black,  remainder  jiaie  testaceous,  club  very  sliglitly  darker,  not 
prominent  ;  tliird  joint  onedialf  longer  tlian  tin;  fourth,  seventh  much  longer 
than  th(^  eighth,  almost  equal  in  thickness,  last  two  joints  much  wider  and 
longer  than  tin'  ninth:  maxillary  palpi  rather  long,  testaceous,  tliird  joint 
tlatteiied,  iiifuscate  toward  tip.  Prothorax  arcuutely  and  very  gradually  in- 
creasing in  width  to  the  middle,  where  it  is  distinctly  narrower  than  long  ; 
sides  tluuice  moderately  convergent  posteriorly  and  just  perceptibly  sinuate  : 
anterior  and  posterior  laargins  nearly  e([Ual  in  length  and  curvature,  teebly 
arcuate;  surface  feebly  swollen  iw.iir  each  basal  angle,  evenly  and  very 
closely  punctate  ;  punctures  deej),  not  coalesceiit,  near  the  base  almost  poly- 
gonally  ciowded,  rather  coarse.  Elytra  at  base  slightly  wider  than  the  head  ; 
sides  very  feebly  divergent  posteriorly,  very  feebly  arcuate,  longer  than  the 
width  at  base;  together  broadly,  somewhat  angularly  and  rather  strongly 
emarginate  behind;  suture  more  than  one-third  longer  than  the  pronotum  ; 
surface  feebly  impressed  along  the  suture,  more  broadly  so  towaril  the  base, 
very  closely  and  eviuily  punctate  ;  punctures  round,  very  deep,  rather  coarse  ; 
int(U'S])aces  very  narrow.  Abdominal  segments  decreasing  uniforndy  and 
rajiidly  in  width,  first  slightly  narrower  than  the  contiguous  elytra,  nearly 
cylindrical  ;  border  obsolete  except  on  the  lirst  segment,  where  it  is  rather 
strong  ;  surface  closely,  dee]>ly,  and  evenly  punctate  ;  interspaces  very  nar- 
row ;  transverse  cariiiae  not  cus})('d,  unevenly  undulated.  Legs  short  and 
slender,  black,  tarsi  dark  piceous-browu  ;  Hist  joint  of  the  posterior  not  as 
long  as  the  next  two  together,  sliglitly  shorter  than  the  last ;  third  joints 
muidi  less  strongly  bilobed  than  the  fourth. 

jl/(//c. — Third  and  fourth  ventral  segments  just  perc(>ptlbly  nioilified  in  the 
middle  fourth  at  apex,  being  feebly  flattened;  fifth  segment  not  modified, 
posterior  edge  very  minutely  spongy  ;  sixth  broadly  incised  at  apex,  incisure 
occujiying  tin;  entire  ajiex,  antcuior  aiigh^  nninded  slightly,  sides  nearly 
straight,  fully  three  times  as  wide  as  deep  ;  seventh  broadly  rounded  behind. 

FeiiKilc. — Sixth  segment  acut(dy  rounded  at  tlui  immediate  apex,  sides 
thence  slightly  sinuate  anteriorly  ;  tip  of  the  seventh  segment  truncate, 
liaving  a  narrow  eiuargination  in  the  middle  of  the  truncation. 

Length  4.0  mm. 

Uritisli  Columbia,  1.'];  Tiiursloii  County,  Washington  Terriiory,  1  ; 
Oregon,  1  ;  Lake  Tuhoe,  Nevada,  I  ;  Culit'ornia,  lo ;  Colorado,  2. 


Stenini. 


12 


'I  1 
i 


I 


I 

if 
1  [ 

!     I. 


m^i--'- 


':      ij 


178 


NORTH    A.MKRICAN 


The  s])Ocimena  associated  above  tlirt'er  among  themselves  to  a  sli^lit 
degree  in  several  particulars.  In  the  Calif'oniian  specimens  the  punc- 
tiii'es  are  not  so  closely  crowded  as  in  the  typical  male,  which  is  from 
Bi'itish  Coininbia.  Tiie  Southern  specimens  also  appear  to  iiave  paler 
and  much  more  pubescent  tarsi.  Tiiere  is  one  male  from  Colorado, 
in  which  the  sexual  modification  is  sligiitly  difl'erent,  tlu;  incisure  of 
the  sixth  segment  being  relatively  deeper,  and  having  the  sides  of  the 
nolcii  distinctly  arcuiite  ;  in  this  specimen,  also,  the  seventh  segment 
is  more  strongly  and  narrowly  rounded  behind.  'liiese  specimens 
resemble  each  other  so  closely,  that  the  most  careful  scrutiny  wilii  a 
hand  lens  fails  to  siiow  any  difference  which  may  not  be  accidental, 
and  I  have,  therefore,  concluded  to  unite  tiiem  all. 

The  tarsal  claw  of  this  species  is  sliown  on  tiie  plate,  fig.  14. 

23.  A.  lltenis  n.  sp. — Form  robust.  Piilx'snmice  sliort,  rather  sparse 
and  L'oarsc,  Sfiiii-ert'ct,  evenly  (listiiliiited.  very  daik  eiuereoiis  in  (.olor,  not 
very  conspiunoiis.  Head  moderate,  slij,ditly  more  tlian  twice  as  wide  as  long  ; 
lalinnn  very  protninent ;  intevociilar  fiurlace  nearly  tliree  limes  as  wide  as 
tlie  <'ye,  very  teel)ly  convex;  suliations  narrow,  very  feidile;  intermediate 
surface  twice  as  wide  as  tlie  lateral  portions,  liroadly  and  feebly  convex  ; 
punctures  ratlK'r  stnall,  round,  deep,  nearly  evenly  distributed,  distant  by 
less  than  one-half  tlunr  own  widths;  octilar  lines  convergent,  meeting  at 
about  one  length  in  advance;  antennae  as  long  as  the  width  of  head,  fiinicle 
rather  slender,  club  elongated,  not  prominent,  compact,  basal  joint  black, 
remaind((r  translucent,  dark  testaceous,  <;lub  distinctly  darker;  third  joint 
one-third  hmger  than  the  fourth,  seventh  much  longer  tlian  the  eighth, 
nearly  e<iual  in  thickness,  joints  of  club  inci'easing  slowly  in  huigth,  tenth 
almost  exactly  cylindrical  throughout  its  lengtii  ;  maxillary  palpi  long,  third 
joint  rather  slen<ler,  nearly  as  long  as  the  first  two  together,  tiist  two  joints 
and  the  base  of  the  third  translucent,  llavo-testaceous,  third  infuscate  toward 
ti]).  Sides  of  protliorax  for  two-thirds  the  length  posteriorly  nearly  parallel, 
ratlier  strongly  and  evenly  arcuate,  thence  rather  strongly  convergent  to  the 
base  and  just  visilily  sinuate;  anterior  margin  slightly  longer  than  the 
posterior,  both  nearly  straight;  disk  of  pronotum  very  slightly  narrower 
than  long,  very  feelily  swollen  near  each  basal  angle  ;  punctures  deep,  rather 
coarsa,  very  close,  round,  and  nearly  eveidy  distriliuted,  varying  slightly  in 
size,  generally  distant  l)y  one-lialf  their  widths.  Elytra  at  base  very  slightly 
wider  tlutn  the  bead  ;  sides  nearly  parallel,  slightly  long(>r  than  the  wi<lth  at 
base,  feebly  and  somewhat  uncvcuily  arcuate  thi'oughout  ;  together  broadly, 
roundly,  and  moderately  emarginate  behind  ;  suture  two-tifths  longer  tlian 
the  ■|)ronotum  :  surface  broadly  and  extremely  feebly  impressed  along  the 
suture,  elsewliere  very  feebly  and  indefinitely  undulated,  nearly  even  ; 
punctures  coarser  toward  the  apices,  somewhat  unevenly  distributed,  deeply 
impressed,  generally  separated  by  nearly  their  own  widths  ;  interspaces  very 
feebly  convex,  polished,  scarcely  visibly  reticulated.  Abdominal  segments 
decreasing  uniformly  and  rather  rapidly  in  width,  first  as  wide  as  the  con- 


COLEOPTKRA. 


171) 


tignoiis  elytra,  sub-cylindrical  .iftor  the  first,  \''iii(;li  alone  is  distinctly  mar- 
gined ;  surface  very  dec'ply,  chisely,  evenly,  and  rather  eoaisely  [lunctate  : 
punctures  about  as  lai'gc  as  those  of  the  elytra  ;  infin-spaces  feebly  convex, 
narrower  than  the  jiunctnres,  highly  polished.  Legs  short  and  slender, 
black,  tarsi  rather  dark  i)iceous-br()\vn,  joiuts  very  roliust,  densely  hirsute, 
especially  beneath  ;  (list  joint  scarcely  two-tiiirds  as  long  as  the  last  ;  fourth 
joints  very  strongly  bilobcd,  tiiird  very  deeply  eiiiarginate  at  tip. 

Mii/e. — Hixth  segment  bi'oadly  incised,  incisure  occujjying  the  entire  seg- 
mental width  at  ajicx,  sides  nearly  straight,  aiiti-i-jor  angh*  rather  broadly 
rounded,  exterior  angles  rounded,  widtii  nearly  foui'  tim<'S  tlie  depth  ;  scn-eiitli 
segment  obtusely  rounded  behind. 

Fcmtilc. — Sixth  segment  angularly  and  acutely  produced  at  tip,  sides  of 
angle  very  feebly  sinuate. 

Length  3.I--4.4  nun. 

Fort  Garlaiul,  Colorado,  7. 

This  specie's  ai>|iroxinial<'s  more  closely  to  tiic  Eiiropcaii  fursiifis 
Ljuiigli  tlian  any  otlicr  wliicii  I  iiave  been  able  to  examine;  it  dirt'ers 
from  tliiit  .species  as  follows  : — 

Tlie  elytral  punctuation  in  tdrxalls  is  more  even  in  distribution 
and  in  the  size,  of  tlie  [junctures,  tlie  elytra  lojiether  are  shorter  iind 
more  strongly  emarginate  behind,  and  the  maxillary  palpi  are  shorter 
and  more  robust  than  in  uteuis. 

In  the  former  the  tarsi  are  less  robust,  less  strongly  pubescent,  and 
have  the  first  joint  relatively  longer  tiian  in  the  latter. 

The  sixtli  segment  in  the  female  o\'  tars(dis  is  more  obtuse  behind, 
and  more  acutely  and  abruptly  produced  as  a  cusp-like  point  at  the 
immediate  apex  than  in  the  like  sex  of  ntenis. 

There  are  other  differences,  especially  in  tlie  more  robust  shape  of 
the  American  s|)ecies,  wiiicii  might  be  given,  but  the  above  will  serve 
to  show  tliat  the  two  species  iire  almost  umiuestionably  distinct. 

The  tarsal  claw  as  figured,  plate,  fig.  IT),  is  seen  to  be  more 
abrui)tly  bulbous  at  the  base  than  that  of  tarsalis.  The  (jonforin- 
ation  of  this  appeiulage  does  not  vary  appreciably  witlt  sex,  as  far  as 
I  have  been  able  to  observe. 


24.  A.  trajecfllS  n.  sp. — Form  robust.  Pubescence  rather  long,  fine, 
evenly  distriluited,  sub  recumbent,  dark  cinereous,  moderately  conspicu>ius. 
Head  moderate  in  size  ;  biljrum  liroad,  rathor  prominent ;  interocular  surface 
two  and  one-half  times  as  wide  as  the  eyj,  flat ;  siilcations  narrow,  conver- 
gent, rather  feeble  ;  intermediate  surface  twice  as  wide  as  the  lateral  portions, 
very  feebly  and  broadly  convex  ;  punctures  rather  irregular  in  outline,  close, 
aluKvst  evenly  distributed  ;  ocular  linos  nu'i'ting  at  two  lengths  in  advance  ; 
antennae  rather  longer  than  the  width  of  head,  somewhat  slender,  cluli 
moderate,  basal  joint  piceous-black,  remainder  pale  testaceous,  club  just 
visibly  darker  ;    third  joint  one-halt  longer  than  the  fourth,  joint.-,  of  club 


f 


180 


NORTH    AMERICAN 


''m 


;  -^ 


!  1 


I  ' 


increasing  rapidly  in  lenj^tli,  clcvciitli  almost  ns  long  as  tlio  ninth  niu\  tenth 
togetluir ;  maxillary  palpi  rather  long  and  Hlunder,  translucent,  pale  testa- 
ceonH  throiijrhoiit,  reddish  towanl  the  tip,  more  tlnvate  toward  the  hase,  third 
joint  much  shorter  than  the  lirst  two  totjether.  Prothorax  widest  at  the 
middle,  where  it  is  distinctly  narrower  than  long  ;  sides  thence  rather  feehly 
convergent  and  slightly  arcuate  anteriorly,  slightly  more  strongly  convergent 
posteriorly  and  nearly  straight;  anterior  margin  slightly  longer  than  the 
posterior,  hoth  nearly  straight  ;  surface  nearly  evenly  convex,  very  closely, 
rather  coarsely  and  somewhat  irregularly  jjunctate  ;  ])unctures  irregularly 
polygonal,  M'ry  closely  crowded  at  some  points.  Elytra  at  hase  about  as 
wide  as  the  heail  ;  sides  fe(d)ly  divi-rgent  jiosteriorly,  very  slightly  longer 
than  the  width  at  hase,  vi)ry  feel)ly  arcuate,  nearly  straight  towaid  the 
humeri  ,  together  vcT'y  hroa<ily,  roundly,  and  rather  strongly  emarginate 
hehind  ;  suture  onc^-fit'th  longer  than  the  iironotiim  ;  surface  ljroa<lly  and  very 
feehly  imi>ressed  oil  tilt!  suture  at  the  hiise,  tdsewla^'e  evenly  convex  ;  jiuiic- 
tures  evenly  distributed,  nearly  round,  deep,  distant  by  slightly  more  than 
one-half  their  widths  ;  interspaces  rather  strongly  convtix,  polished,  very 
feelily  reticulated.  Abdominal  segments  decreasing  uniformly  and  rapitlly 
ill  width,  cylindrical,  first  just  perceptilily  narrower  than  the  contiguous 
elytra;  first  very  narrowly  margined,  remainder  not  margined;  surface 
deeply,  closely,  (evenly  punctate  ;  punctures  round,  smaller  than  those  of 
elytra,  distant  by  less  than  their  own  widths.  Legs  short,  black,  tarsi 
pale  tiavate  ;  lirst  joint  of  the  posterior  elongated,  as  long  as  the  next  two 
together,  slightly  longer  than  the  fifth  ;  second  nearly  twice  as  long  as  the 
third  ;  fourth  joints  moderately  bilobcd,  third  moderately  emarginate  at  tip. 

Mull!. — Unknown. 

Female. — Sixth  ventral  segment  very  obtuse  btdiind,  very  broadly  angulate 
at  the  middle,  angle  not  rounded,  sides  nearly  straight. 

beiiyth  ;5.!--4.ri  mm. 


Vetii  Pass,  Colorado,  2. 

Very  readily  distinj^uislied  from  any  otlier  in  this  vicinity  by  the 
peculiar  .structuiv  of  tiie  tarsi. 

Tlic  tarsal  claws  are  nearly  simple  and  very  slender,  as  may  be 


seen  in  tlie  figure. 


f     '1 


25.  A.  papagOIlis  n.  sp. — Form  robust,  somewhat  depressed.  Pubes- 
cence rather  short,  evenly  distributed,  somewhat  dense,  and  but  moderately 
eonspicutnis,  cinereous.  Head  rather  large,  twice  as  wide  as  long  ;  labruin 
moderate;  eyes  promimmt ;  int+n'ocular  surface  slightly  mort^  than  twice  as 
wide  as  the  eye,  slightly  convex  ;  sulcations  very  feeble  ;  intermediate  sur- 
face more  than  twice  as  wide  as  the  lateral  portions,  broadly  and  rather 
strongly  convex  ;  jiunctures  round,  rather  small,  very  deep,  evtMily  distri- 
buted, distant  by  less  than  one-half  their  widths  ;  ocular  lines  ratlier  con- 
vergent, meeting  at  less  than  two  lengths  in  advance  ;  antennae  moderately 
robust,  scarcely  longer  than  the  width  of  head,  basal  joint  black,  remainder 
pale  yellowish-testaceous,  ••lub  scarcely  darker,  not  vt'vy  prominent;  third 
joint  two-thirds  longer  than  the  fourth,  not  as  long  us  the  next  two  together, 


COI.EOPTERA. 


181 


rapidly 


seventh  niunli  longer  and  Hli)j;litly  less  nilmst  tlion  tin-  ('i;,'litli,  ninth  nearly 
as  large  as  tin?  tenth  ;  maxillary  palpi  long  and  slen<ler,  i)ale  llavo-testai^'oiis 
'hroiighoiit,  third  joint  as  long  as  tlie  lirst  two  together.  Prothorax  widest 
in  thtf  middle,  wher<^  it  is  mnch  narrower  than  long,  and  scarcely  more  tlian 
three-fonrths  as  wide  as  the  Inmd  ;  siiles  tiience  slightly  more  convergent 
posveriorly  than  anteriorly,  nearly  straight  in  hoth  ;  jirominently  angiihite 
at  the  wid(^st  suction;  anterior  margin  slightly  longer  than  the  piisterioi*, 
eqnally  and  extremely  feehly  arcnate  ;  snrfaco  jtist  visihly  and  minntely 
swollen  near  each  hasal  angle,  elsewhere  very  evenly  convex  ;  punctures 
very  deep,  round,  nearly  evenly  ilistrihuted,  rathi-r  small,  distant  l>y  less 
than  one-half  their  widths.  Elytra  at  hase  ahout  ecjual  in  width  to  the 
head  ;  sides  nearly  parallel,  distinctly  arcuate,  very  slightly  longer  than  the 
width  at  hast!  ;  together  hroadly,  roundly,  and  rather  strongly  emarginate 
behind  ;  suture  one-fourth  longer  than  the  pronotum  ;  surface  somewhat  de- 
pressed, very  feehly  impressed  along  tlu^  suture,  very  even  ;  ])unctures  rather 
coarse,  very  close,  evenly  distrilnited,  deep,  distant  hy  ahout  one-half  their 
widths  ;  interspaces  nearly  Hat,  highly  polished,  very  intense  black.  Abdo- 
minal segments  decreasing  uniforndy  and  very  gradually  in  width,  lirst  as 
wide  as  the  contiguous  elytra,  sub-(!yliiidri(^al  after  the  first ;  border  nearly 
obsolete,  except  on  the  lirst  where  it  is  prominent ;  surfact^  very  deeply, 
closely,  and  evenly  i)unctate;  punctures  as  large  as  those  of  the  pronotum  ; 
transvei'se  carinae  slightly  cusped  in  the  mi<ldle.  Legs  moderate  in  length, 
slender,  black,  tarsi  i)ale  fulvo-testaceous  ;  first  joint  of  the  posterior  as  long 

as  the  last  two  together,  also  as  long  as  the  S(!coiid  and  third  together,  s nd 

nearly  twice  as  long  as  the  third;  fourth  joints  small,  lobes  small;  third 
joints  very  deeply  emarginate  at  tip. 

Mitlf.. — Unknown. 

Female. — Sixth  ventral  segment  broad  and  very  obtuse  biOiind,  produced 
in  the  middle  in  the  form  of  a  broad  cusp,  point  very  feebly  rounded,  sides 
near  the  cusp  feebly  sinuate. 

Length  4.4  mm. 

Arizona,  3. 

The  punctuation,  very  dt'ep,  close,  and  regular,  reminds  us  of  that  of 
piiif/in'Sjirom  the  Pacific  Coast.  Tiie  intej^unieuts  in  tiiis  species  are 
of  an  iniense  black,  differing  from  the  usual  grayish-black  of  tlie  more 
closely-allied  s[)ecies.  The  large  head,  sub-quadrate  depressed  elytra, 
very  pale  palpi  and  tarsi,  and  deep  dense  punctuation,  will  aid  in 
identifying  it. 

Tlie  conformation  of  the  tarsal  claw  is  shown  on  the  plate  ;  it  is 
much  more  slender  and  less  abnormal  than  in  other  species  in  this 
vicinity. 

2().  A«  Obsoletlis  n.  sp. — Form  rather  slender,  sub-eylindrical.  Pubes- 
cence short,  rather  coarse,  moderately  spatHe,  evenly  distributed,  cinereous. 
Head  rather  small,  scarcely  twice  as  wide  as  long;  inli^rocular  surface  nearly 
Hat,  three-fourths  wider  than  the  eye  ;  equally  divided  by  the  sulcations, 


.a:-.^ 


I  -l^HIT  t"\;        T 


ii!P>' 


182 


NORTH    AMERICAN 


!•  ::i' 


m 


w)iii'li  arc  scan^cly  visible! ;  piiiietiires  large,  rduiid,  deeply  iini>ri'sse(l ;  evenly 
ilistriliuteil,  distant  l)y  alxiiit  one-lialf  their  own  widtlis  ;  iiitersi>a('es  ])()lislied; 
ocular  lines  meeting  at  abont  oni!  length  in  advance  ;  antennae  nuidi  longer 
than  the  width  of  head,  i)ale  testaceous,  darker  toward  tip,  slender,  ( Itih 
moderate;  third  joint  oius-lialf  longer  than  the  fourth,  eighth  moris  rolinst 
than  the  seventh,  joints  of  dub  slightly  elongated  ;  maxillary  palpi  slender, 
l»ng,  llavate,  tliiid  joint  slightly  dnsky  toward  tip.  Prothorax  arcnatidy, 
evenly,  and  gradnaily  incieasing  in  width  to  the  nnddle,  where  it  is  tour- 
fifths  as  wide  as  tiie  head  and  distinctly  narrower  than  long;  sides  thenc« 
rather  more  vapidly  convergent  postiM'iorly  and  feebly  sinuate;  anterior  and 
posterior  niaigins  equal  in  length  and  curvature,  ratlua-  teebly  arcuate; 
surface  closely,  finely,  deeply,  and  evenly  punctate  ;  interspaces  convex 
and  iiolished.  Elytra  at  base  about  e(iual  in  wiilth  to  the  head  ;  sides 
ratlicr  feebly  ilivegiMit  posteriorly,  slightly  longer  than  the  width  at  base, 
rather  strongly  arcuate,  more  strongly  so  ])osteriorly  ;  together  broadly, 
roundly,  and  rather  strongly  emarginate  behind  ;  suture  nearly  one-fourth 
longer  than  the  pronotum  ;  surface  convex,  slightly  impressed  on  the  suture 
toward  the  base,  closely,  nearly  evenly,  rather  linely,  and  very  deeply 
]iunitate;  intei'si)aces  narrower  than  the  punctures,  very  convex,  jiolished. 
Abdominal  segments  cylindrical,  decreasing  uniformly  and  rather  raj)idly  in 
width,  tirst  distinctly  narrower  than  the  contiguous  elytra;  border  obsolete; 
surface  very  closely,  coarsely,  deeply,  and  conspicuously  jiunctate  ;  each  seg- 
ment strongly  constricted  at  base  ;  transverse  carinae  not  cusped,  finely  un- 
dulated. Legs  rather  long  and  slender,  piceo-fuscous,  femoi'a  much  pahir 
beneath  ;  first  threi!  joints  of  the  posterior  tarsi  uniforndy  decreasing  in 
length  ;  fourth  joints  strongly  bilobed. 

Mull'. — Sixth  segment  very  narrowly  and  deeply  incised,  angle  of  incisure 
very  slightly  I'ounded,  nearly  acute,  depth  more  than  twice  its  width  ;  seventh 
segment  narrowly  and  feebly  emarginate  at  tip,  emargination  rounded,  teeth 
small,  acute,  iindined  inward. 

lu'iiKilc. — Sixth  segment  broadly  and  ohtusely  roundiMl  behind.  Elytra  at 
base  usually  slightly  wider  than  the  head  ;  foru)  more  robust ;  abdomen  wider. 

Length  3.0  mm. 

Grimsby,  Ontario,  /), 

Tlii.s  s|)e(!i('s  hcurs  ii  jfieiit  reseml)liiiicii  to  piinctatus  (Er.),  und  also 
to  infiis.  It  (liHi'is  from  the  former  in  its  more  slender  form  and 
finer  punctuation,  and  especially  in  its  much  more  slender  prothorax; 
from  iirtiis  it  (lilfcrs  in  the  form  of  tiie  pronotum,  which  in  that  species 
is  very  slender  and  notai)ly  narrowed  anteriorly. 


Ik 


27.  A>  an'tlis  n.  sp. — Form  very  slender.  Pubescence  sparse,  very  fine, 
semi-erect,  dark  j)lunibeoiis,  scarcely  visible  ;  entire  surface  of  the  body 
highly  polished.  Head  rather  small,  robust,  nnicli  less  than  twice  as  wide 
as  long;  interocular  surface  nearly  fiat,  one-half  wider  than  the  eye;  sulca- 
tions  narrow,  not  consi)icuous  ;  intermediate  surfact^  as  wide  as  the  lateral 
portions,  very  feebly  convex  ;  punctures  large,  round,  deeply  impressed, 
nearly  evenly  distributed  except  in  the  sulcations,  where  tliey  are  slightly 


COLEOrTERA. 


188 


smaller  and  iiiori!  crowded  ;  su|iru-!intfiinal  tiilM-rciihitioiis  l<>iig,  narrow,  ini- 
punctate,  iironiiiiciit ;  ocular  lin<'s  iiicctiiif,' at  scarcely  oiio  Icnjjtli  in  advance; 
antennae  inncli  lon;,'er  tlian  the  width  of  head,  rather  pale  itii^eouH-hrown, 
slightly  darker  toward  tip,  liasal  joints  paler,  opacjnc,  ochri^jns  ;  third  joint 
one-tliird  longer  than  the  fonrtii,  seventh  nnich  lonf;er  than  the  einlitli,  less 
rolnist,  ninth  and  tenth  scarcely  lonf^er  tiian  wide,  last  iiioi'('  elongated  ; 
maxillary  jialpi  very  long  and  slender,  pale  llavate,  third  joint  very  slightly 
cloiidud  toward  tip,  very  slender,  uiucli  shorter  than  tli«  first  and  second 
togi'tlier.  Prothorax  ar<'nately  and  rather  rapidly  increasing  in  width  to  a 
])oint  slightly  1  'hind  tliemiildle,  where  it  is  much  narrower  than  long;  sides 
theniu-  very  fee, )ly  convergent  ])ostHriorly  and  distinctly  sinuate;  anterior 
margin  distinctly  shorter  and  more  arcuate  than  the  posterior  ;  tlie  latter 
nearly  str.'iiglit,  and  lint  very  slightly  shorter  than  the  grc^atest  wi<Uh  of  the 
prothorax  ;  surface  evenly  and  strongly  convex,  rather  coarsely,  closely,  and 
evi'nly  puni^late ;  ininctures  deeply  impressed;  interspaces  convex;  along 
the  middle  for  a  short  distanct!  there  is  a  narrow  canaliculation,  terminating 
at  equal  distances  from  the  bases,  and  apparently  formed  by  coalescent  i)unc- 
tures.  Elytra  at  base  as  wid(\  as  the  henil  ;  sides  nearly  parallel,  slightly 
longer  than  tln^  width  at  base,  rather  strongly  arcuate,  slightly  more  stnuigly 
so  posteriorly;  together  broadly,  roundly,  and  v(-ry  strongly  euiargiuate 
behind;  suture  scarcely  one-eighth  longer  than  the  pronotum ;  surface  vi'ry 
conv<!x,  feebly  and  narrowly  inipressc^l  along  tint  suture,  very  coarsely, 
closely,  and  evenly  punctate;  punctui(^s  round,  deeply  impressed,  distant  by 
less  than  their  own  widths  ;  intersjiaces  very  convex.  Abdominal  segnuMits 
decreasing  uniformly  and  very  grailually  in  width,  lirst  distinctly  narrower 
than  the  contigU(ms  elytra,  cyliiidiical,  slightly  cons'victed  at  bas(f ;  surface 
rather  coarsely,  very  closely,  and  evenly  punctatt!  ;  pLinctures  rather  irregu- 
lar in  outline,  somewhat  deeply  impressed,  becoming  much  smalhu'  and 
slightly  more  distant  on  the  posterior  segments  ;  transverse  carinae  not 
cusped,  arcuate  in  the  middle,  finely  and  somewhat  fi'ebly  undulate  jilong 
the  posterior  edges.  Legs  short  ami  ndiust,  pah'  o()aiiue  yt^llovvish-browu 
in  color;  first  joint  of  the  posterior  tarsi  slightly  shorter  than  the  next  two 
togetlu'r,  distinctly  shorter  than  the  fifth  ;  fourth  joints  strongly  bilohed, 
lobes  narrow. 

Male. — Sixth  v(!ntral  segment  very  deeply  and  narrowly  incised  at  apex, 
incisure  nearly  twice  as  deep  as  wide,  narrowly  rounded  at  the  anterior 
angle,  exterior  angles  rather  broadly  rounded,  siiles  nearly  straight;  seventh 
broadly,  roundly,  and  rather  feebly  emarginate  at  apex,  lateral  teeth  very 
minute,  straight. 

FciiKile. — Unknown. 

Length  (abdomen  extended)  3.1  nua. 

New  York,  1. 

Tlie  peculiar  form  of  the,  prothorax  will  distinguish  this  species 
from  ohsoletus ;  other  dirt'erences  are  found  in  tlie  structure  and 
punetnution  of  the  elytra  and  maxillary  palpi,  and  also  in  tiie  very 
peculiar  opaque,  ochreous-yellow  color  of  tlie  legs,  wiiich  are  much 
less  densely  pubescent  than  in  the  allied  species.     The  sexual  char- 


k 


ill 


184 


NOUTII    AMKniCAN 


S:, 


;:;!•  :i 


lii 


:'.        '.I     ' 


actcrs  lire  ulinust  exactly  the  same  as  those  of  the  above-mentioiit'd 
species. 

2S.  A.  (lillltllH  11.  sp. — Fdini  vi-i-y  slfiidcr.  I'libcscciico  very  sjtarsf,  /iiic, 
(lark  jiliiiiilic'oiis,  s(rarc'el.v  viMil>l(».     Head  robuHt,  less  tlinii  twice  ns  widons 

Idiif,' ;  iiitfi'oi'iilar  siirl'iiof  ll;it,  twu-tliinls  wider  ttiiiti  tlic  fyc  ;  siilcatifnis  very 
narrow,  I't'clili'  and  ol)s(.'nrc  ;  intcniiccliatc  snrlaci'  i-xccssivcly  ffdily  coiivi'x  ; 
lUinctiiri'M  ratlicr  coarse  and  deep,  nearly  ali.si'iif  aloiif;  tlie  iiiiildli',  iiiorr 
crowded  in  tlie  snlcatioiis  ;  oenlar  lines  ineetiii;,'  at  one  leiifitli  in  advance; 
antennae  distinctly  loiif^er  than  the  widtli  of  head,  rather  pale  brownish- 
testaceous,  club  distinctly  darker,  rather  proiniiieiit ;  third  joint  one-third 
l(iiif,'er  than  the  fonrtli,  eiyhtli  scarcely  loiif^er  than  wide,  very  robust,  iniicli 
shoiter  and  thicker  than  the  seviMith,  joints  of  (dub  increasin;,'  iiiiit'orinly  and 
rather  },'radnally  in  length;  maxillary  palpi  long  and  slender,  llavati",  third 
joint  slender,  nearly  as  long  as  the  lirst  two  together.  Prothorax  widest  at. 
the  inidille,  where  it  is  nmcli  narrower  than  long;  sides  thence  etinally  and 
extremely  feebly  convergent  anteriorly  and  ]>ostericrly,  nearly  straight  in 
both  cases  ;  anterior  and  jMisterior  margins  c(|nal  in  length,  the  former  rather 
strongly  arcuate,  the  latter  very  sliglitly  more  feebly  so;  surface  evenly  and 
strongly  convex,  nearly  cylindrical  :  j)unctiires  deeply  impressed,  very  close, 
rather  unevenly  distiibuted,  somewhat  .small;  interspaces  strongly  convex, 
liighly  polishecl.  Elytra  at  base  as  wide  as  the  head  ;  sides  nearly  parallel, 
distiiicliy  longer  than  the  width  at  base,  nearly  straight  towaril  the  biinieri, 
very  strongly  arcuate  towanl  the  exterior  ajiical  angles  ;  together  broadly, 
somewhat  angularly  and  strongly  emarginate  behind  ;  suture  about  one- 
tenth  longer  than  the  pronotnm  :  surface  strongly  convex,  narrowly  and 
feelily  iin|iri'ss('d  along  the  suture,  more  strongly  so  toward  the  base,' 
coarsely,  deeply,  and  closely  punctate,  pieeous  in  color;  luinctures  soiiks- 
what  irregular  in  outline,  distant  by  less  than  their  own  widths  ;  inter- 
spaces strongly  convex,  highly  polished.  Abdominal  segments  decreasing 
nearly  uniformly  and  just  percc^ptibly  in  width,  first  iiinch  narrower  than 
the  contiguous  elytra,  cylindrical,  strongly  constricted  at  base  ;  transverse 
carinae  broadly  and  strongly  undulated  ;  surface  strongly,  closely,  and 
evenly  punctate  ;  interspaces  convex,  polished,  not  as  wide  as  the  punc- 
tures. Legs  slender,  pale  brownish-testaceous  throughout,  tarsi  short;  first 
joint  of  the  ])osterior  nearly  twice  as  long  as  the  second. 

Mti/<'. — Fifth  ventral  segment  scarcely  perceittibly,  roundly,  and  narrowly 
emarginate  in  the  middle  at  apex  ;  sixth  narrowly  and  deejdy  incised  at  tip, 
incisure  more  than  twice  as  deep  as  wide,  anterior  angle  very  narrowly 
rounded,  exterior  angles  narrowly  rounded,  sides  slightly  arc^nate;  seventh 
segment  broadly  and  feebly  emarginate  at  the  vertex,  emargination  nearly 
transverse  at  the  bottom,  lateral  teeth  short,  stout,  and  straight. 

Ffjiuile. — Sixth  segment  very  broadly  and  evenly  rounded  behind. 

Length  3.0  mm. 

Louisiana,  2. 

The  piccoiis  color  of  the  elytra  and   portions  of  the  abdomen  seen 
in  the  above-described  species,  and  also  to  a  certain  extent  in  the 


li 


COLKOrTKKA. 


1H5 


elylm  of  nrtim,  is  not,  to  tlie  best  (»f  my  knowlcdp;*',  due  ontin-Iy  to 
iintniiliirity,  lint  is  :(  f'ctitiin'  of  the  inatiirc  insect. 

Tlic  (listinjinisliinji  cliiintfttrs  licldii^inj;  l<i  tiic  tlinv  spcrics,  <(i/ii. 
(lis,  nrfiis,  and  ohsofttiis,  arc  in  the  iMinctuation  of  tlit*  clytia,  wliicli 
is  inucli  the  finest  and  Ldosest  in  tiic  hist,  ami  in  tiie  strnctnre  of  the 
piDlhoiiix,  wiiich  renders  arfns  inniie(Iiately  reeoi^nizahie.  The  sexual 
ciiaractcrs  are  strikin^fjy  iinitorin  throu^^hoiit  the  series. 


2!t.  A>  meriilioiltllls  n.  sp.  (Sdiwarz  MS.). — Form  slender,  sult-cylin- 
driciil.  l'iilii'-;cciiii>  iMtlhT  simrse,  slmrt,  evenly  ilistrilmteil,  siili-rei'miiliciit, 
cinereous,  ratlicr  ineonspicnous.  Kntire  liody  nioderatidy  Hhiniti>;.  Head 
ratlier  roliust.  srareely  twice  as  wide  as  loii}; ;  interoriilar  surface  scarcely  ime- 
tiiivd  wid<'r  liian  IIk'  eye,  nearly  tiat  ;  snications  almost  entirely  olisolcte  ; 
punctures  rather  sparse  and  irre^jularly  distrilmted  :  ocular  lines  meeting 
at  less  than  one  hinsjth  in  advance;  eyes  very  ])r(iminent ;  anti'Unae  short, 
scarcely  lonf;er  than  the  width  of  head,  i)iceous-l(i'own,  ilarker  toward  tip, 
slender,  clul)stron<,' ;  third  joint  one-fourth  loUfrer  than  the  fourth,  eii;lith  more 
rohust  than  the  seventh,  last  joint  of  ciuh  as  long  as  the  eighth  and  ninth 
together;  basal  joint  of  antenna  slightly  paler ;  niaxillaiy  )>ali)i  very  hing 
and  slender,  almost  as  long  as  the  antenna,  tiavate,  tijiof  third  Joint  slightly 
darker.  Prothorax  arciuUely,  evenly,  and  v<'ry  gradually  increasing  in  width 
to  the  middle,  wliere  it  is  one-eighth  narrower  than  long  and  scarcely  thi'ee- 
fourths  as  wide  as  the  heail  ;  sides  thence  equally  convergent  posteriorly 
and  feehly  sinuat(> ;  anterior  and  jHisterior  margins  snh-equal  in  length  and 
curvature;  surface  finely  and  somewhat  confusedly  punctate;  punctures 
tending  to  coalesce  transversely.  Elytra  at  hase  e(|ual  in  width  to  the  head, 
or  hut  very  slightly  narrower  ;  sides  ])aiallel,  slightly  longer  than  the  width 
at  hase,  nearly  straight  toward  the  humeri,  slightly  arcuate  toward  the 
a]>ic<'S  ;  together  roundly  iiud  rather  strongly  emarginate  hehind  ;  suture 
slightly  lunger  than  the  pronotum  ;  surface  rather  strongly  impressed  on  the 
suture  toward  the  base;  punctures  large,  close,  nearly  evenly  distributed, 
distant  by  about  one-half  their  widths.  Abdominal  s(>gments  decreasing 
uniformly  and  just  percejitilily  in  width,  first  much  narrower  than  the  con- 
tiguous elytra,  cylindrical  ;  border  obsolete;  strongly  constricted  towjird  the 
base  ;  surface  coarsely,  closely,  and  evenly  jmnctate  ;  punctures  larger  than 
those  of  the  pronotum,  deeply  impressed,  almost  polygonally  crowdeil ;  trans- 
verse carinae  not  cusped.  Legs  somewhat  long,  very  slender,  uniformly  pale 
piceous-brown  ;  first  joint  of  the  posterior  tarsi  not  as  long  as  the  next  two 
togt'ther  ;  fourth  joints  strongly  bilobed,  lobes  very  narrow. 

Mule. — Posterior  edge  of  the  fifth  ventral  segment  just  visibly  emarginate 
in  its  middle  sixtli  at  apex,  emargination  ronnd<'(l  and  excessively  feeble  ; 
sixth  segment  very  deej)ly  and  somewhat  narrowly  incised  at  apex,  incisure 
extending  anteriorly  througb  two-thirds  of  the  segment,  angle  sligbtly 
rounded,  sides  nearly  straight,  exterior  angles  slightly  rounded,  slightly 
more  than  twice  as  deep  as  wide ;  seventh  triangularly  emarginate  at  tip. 

Fi'mule. — Sixtli  segment  strongly,  broadly,  and  somewhat  angularly  rounded 
behind  ;  seventh  acuminate  at  tip. 

Length  2.3-2.7  mm. 


I  !■ 


^^^^( 


IMAGE  EVALUATION 
TEST  TARGET  (MT-S) 


y 


// 


A 


u. 


■4. 


1.0 


I.I 


IA£|^    12.5 

150     1*^^        M^^K 

40    Hill  2.0 


22 


1.8 


11-25  i  1.4   i  1.6 


%. 


7a 


'/ 


//a 


I 


*, 


rr 


ifT 


18G 


NORTH    AMERICAN 


Floridft  (various  localities),  13.  '  ' 

Tliis  is  the  smallest  species  of"  the  genus,  and  is  remarkable  for  the 
large  eyes  and  strong  punctuation  of  the  doi-sui  suri'ace  of  the  abdo- 
men. 


>:  ^ii! 


\4    r: 


30.  A.callOHUS  (Er.) — Form  rather  slinidi^r.siili-cyliiulric.il.  riilicsctciice 
ratlicr  sparse  and  ine(ms|)i('iious,  loiif^cr  on  the  alxlonieii,  wliere  it  is  slightly 
denser,  einereons.  Hoily  very  liighly  polislied.  Head  small,  twice  as  wide 
as  long  ;  interoenlar  surface  tM'ice  as  wide  as  the  »>yt%  Hat ;  sulcations  broadly 
rounded,  rather  faint;  snpra-antennal  tuherculations  elongateil,  iiiipunctate; 
surface  between  the  sulcations  highly  polished  and  inipunctate  ;  punctures 
small,  confusedly  crowded  in  the  sulcations  ;  ocular  lines  meeting  at  about 
one  length  in  advance  ;  antennae  distinctly  longer  than  the  width  of  head, 
slender,  i)ale  piceous-brown,  distal  ends  of  the  joints  darker,  club  modt^rate, 
much  darker;  third  joint  nearly  one-half  longer  than  the  fourth,  joints  of 
dul)  increasing  in  length  and  width  ;  maxillary  paljii  very  long  and  slender, 
tt;".at(!  throughout.  Prothorax  arcuately,  evenly,  and  extremely  gradually 
increasing  in  width  for  two-thirds  the  length  jMisteriorly,  where  it  is  very 
slightly  narrower  than  long  ;  sides  thence  very  feebly  convergent  and  dis- 
tinctly-sinuate;  anterior  and  posterior  margins  nearly  equal  in  length,  the 
former  distinctly  arcuate,  the  latter  nearly  straight;  surface  rather  tinidy 
and  evenly  jumctate  ;  i)unctures  generally  separated  by  less  than  their  own 
wiiUlis,  a  fusiform  spact;  in  the  middle  of  the  disk  inii)nnctate.  Elytra  at  base 
slightly  wider  than  the  head  ;  sides  nearly  i)aralt<d,  very  strongly  arcuate 
near  the  apices,  nuich  less  so  near  the  humeri,  very  slightly  longer  than  the 
width  at  base;  together  broadly  and  moderately  emargiiiate  behind;  suture 
nearly  one-lifth  longer  than  the  pronotum  ;  surface  very  feebly  imi)ressed  on 
the  snturt^  toward  the  base,  finely  and  evenly  punctate;  punctures  round, 
impressed,  distant  by  ni^'arly  twice  their  own  widths  ;  interspaces  convex,  ex- 
trenii'ly  highly  polished.  Abdominal  segments  decreasing  nearly  nniforndy 
and  somewhat  rapidly  in  width,  first  distinctly  narrower  than  the  contiguous 
elytra,  cylindrical;  l)order  obsolete;  strongly  constricted  at  base;  surface 
finely,  distfintly,  and  irregularly  punctulate  ;  transverse  carinae  not  cusped. 
Legs  long  and  slender,  pale  piceo-Havate,  tips  of  femora  darker,  tarsi  rather 
short ;  first  joint  of  posterior  as  long  as  the  next  two  together  ;  fourth  joints 
strongly  bilobed. 

Malv.. — Posterior  edge  of  the  fifth  veiitral  segment  emarginate  in  its  ntiddle 
fourth,  emargination  rather  feeble,  more  acutely  rounded  at  bottom,  nearly 
eight  tiines  as  wiile  as  deep  ;  sixth  segment  very  broadly  incised  at  apex, 
incisure  occupying  the  entire  apex,  nearly  four  times  as  wide  as  deep,  sides 
straight. 

Female. — Sixth  segment  evenly  rounded  behind.  r 

Length  3.0-3.2  mm.  _  ,  .., 

Florida,  19;   Louisiana,  1  ;  District  of  Columbia,  2. 
IJeadily  recognized  by  its  very  pale  legs  and  distinct  sexual  cliur- 
acters.     It  is  peculiarly  southern  in  its  habitat. 


■^i^ 


COLEOPTERA. 


187 


31.  A,  varipes  n.  sp. — Form  iiH  in  atllii.iit.i.  Piibiisceiice  riitlier  coar.su, 
semi-erect,  si)ars(',  ex(;t!])t  on  the  abdonien  wlien;  it  increases  in  density 
tow.'U'd  till'  tiji,  cinereous,  rallier  consjiicwons  ;  iiitef,'iiinents  lii>,'lily  polislied. 
Head  uiodtM-ate  or  ratlier  small,  dlstincttly  more  than  twice  as  wide  as  long; 
lahrnm  prominent ;  interocular  surface  nearly  three  times  as  wide  as  the 
eye,  very  feelily  convex;  sulcations  nearly  obsolete;  intermediate  snrface 
bi'oad,  very  fi'ebly  convcix,  broailly  impunctato  in  the  middle;  punctures 
elsewhere  rather  coarse,  deep,  close,  and  irref^ular  ;  supra-antennal  tubercu- 
lations  elmigati'd,  impunctate  ;  antennae  much  longer  than  the  width  of  liead, 
rather  slender,  piceo-testaceous,  darker  and  opaque  toward  tip,  translucent 
toward  tlie  base,  clnb  slender  ;  third  joint  fully  one-third  longer  than  the 
fourth,  fourth  and  fifth  equal,  sixth  much  longer  than  the  seventh,  the 
latter  sliglilly  more  I'obust,  eighth  very  slightly  longer  than  wide,  joints  of 
club  nearly  cylindrical  ;  maxillary  paljii  long,  first  two  joints  and  base  of 
tin;  third  very  slender,  third  rapidly  and  very  strongly  enlarged  toward  tip, 
no  longer  than  the  second,  all  j)iceo-testaceous ;  the  third  joint  is  distinctly 
darker  abovi^  than  beneath  ;  first  joint  on(^-half  as  long  as  th<^  S(?cond.  Pro- 
thorax  widest  slightly  in  advance  of  the  middle,  where  it  is  distinctly  nar- 
rower than  long;  sides  thence  very  feebly  convergent  posteriorly  and  rather 
strongly  sinuate  throughout ;  anterior  ami  posterior  margins  long,  equal,  and 
nearly  transverse;  surface  coarsely,  closely,  and  deeply  punctate,  having  a 
rather  large;  impunctate  area  in  the  middle  of  the  disk.  Elytra  at  base  just 
perceptibly  wider  than  the  liead  ;  sides  jiaralltd,  strongly  arcuate,  most 
strongly  so  at  two-thirds  the  length  from  the  humi^ri,  much  longer  than  the 
width  at  base;  together  rather  narrowly  an<l  sti'ongly  emarginate  behind; 
suture  about  one-third  longer  than  the  pronotnm  ;  surface  hsebly  and  rather 
broadly  imi)ress(Hl  on  the  suture  at  the  base,  otherwise!  nearly  evenly  convex  ; 
punctures  coarse,  ne^arly  evenly  distributed,  very  deep,  distant  by  iilmut 
their  own  widths,  slightly  variable  in  size  ;  interspaces  convex.  Abdominal 
segments  decreasing  uniforndy  and  rapidly  in  width,  cylindrical,  first  very 
slightly  narrower  than  the  contiguous  elytra,  each  constricted  rather  strongly 
at  the  base,  border  obsolete  except  on  the  first  segment ;  evenly,  strongly, 
and  rather  loosely  punctulate  ;  transverse  oarinae  finely  and  irregularly 
undulated.  Legs  rather  robust,  basal  half  of  femora,  tibiae,  and  tarsi  pale 
ttavo-testaceous,  distal  half  of  feniora  rather  abruptly  much  darker,  casta- 
neous,  tarsi  robust ;  first  joint  of  the  posterior  four-fifths  longer  than  the 
second,  longer  than  and  nearly  twice  as  robust  as  the  fifth  ;  fourth  joints 
bilobed,  lobes  rather  short  and  robust. 

Male. — Posterior  edge  of  the  fourth  ventral  segment  very  broadly  find 
feebly  emarginat((  in  its  ndddle  two-fifths  ;  fifth  roundly  and  feebly  emargi- 
nate in  its  middle  third  at  apt^x,  emargination  about  eight  times  as  wide  as 
deep,  contiguous  surface  flattened  throughout  anteriorly;  sixth  segment 
narrow,  apex  broadly  and  deeply  sinuate,  sinus  occupying  nearly  the  entire 
apical  width,  eviudy  and  rather  broadly  rounded  at  the  bottom,  nearly  four 
times  as  wide  as  deeji,  apices  very  narrowly,  though  evenly  rounded  ;  lateral 
setae  of  seventh  segnusut  very  long  and  coarse,  testaceous. 

Feiiiale. — Unknown.  -    .    - 

Length  3.0  mm.  .    .   .  .      ,        .  ,    ,  .      ..  • 


i 


1  /-i 


?i^l 


I'l-, 


'J^i 


188 


NORTH    AMERICAN 


Detroit,  Micliigan,  1.  ■  , 

Tliis  fiiifi  species  is  distiiijznished  with  ease  from  cnllosus  (Er.)  by 
tlie  palpi,  tiio  last  joint  of  wiiieli  is  sliorter,  darker  in  color,  and  niiicli 
mon^  stronjily  and  abruptly  clavate  in  varipcs.  The  coloration  of  the 
legs  is  also  ditl'erent. 

32.  A.  arcilllis  (Kr.) — Form  rathfi'slonder,  sub-cylindrical.  Pubescence 
sparse,  iuconsiiicuous,  rather  long  and  coarse  on  the  alidome.i,  cinereous. 
Body  liij^lily  polished.  Head  small,  robust,  not  twice  as  wide  as  long: 
interocnlar  siirl'aci!  twice  as  wide  as  the  eye,  very  feebly  (;onvex,  rather 
acutely  8o  in  the  middle  ;  sulcations  almost  obsolete  ;  supra-antennal  tuber- 
culations  much  elon>^ated,  inipun(!tate  ;  j)unctures  coai'se,  deeply  iiu])ress«>(l, 
nearly  (evenly  distributed,  close;  ocular  lines  meeting;  at  one  and  one-half 
lengths  in  .idvance  ;  antennae  rather  short,  scarcely  longer  than  the  width 
of  head,  stout,  ])ale  piceo-testaceous  throughout,  club  moderate,  joints  beyond 
the  first  slightly  darker  at  their  distal  extremities  ;  third  joint  one-half 
longer  than  the  fourth  ;  maxillary  palpi  very  long,  tirst  two  joints  very 
slender,  llavate,  third  infuscate  toward  tip.  Prothorax  arcuately,  evenly, 
and  gradually  increasing  in  width  for  two-thirds  the  length  j)n.sterioi'ly, 
where  it  is  narrower  than  long,  sides  thence  moderately  convergent  and 
very  strongly  sinuate  ;  anteri  ir  Miargiu  slightly  shorter  and  more  arcuate 
than  the  posterior  ;  surface  rather  cotarsely,  very  closely,  deeply,  and  some- 
what evenly  punctate  ;  a  median  lini!  is  generally  impunctate.  Elytra  at 
base  just  perceptibly  *ider  than  the  head  ;  sides  very  feebly  divergent 
posteriorly,  aa  long  as  the  width  at  base,  very  strongly  and  nearly  evenly 
arcuate  ;  together  broadly,  somewhat  angularly  and  very  strongly  emargi- 
nate  liehind  ;  suture  about  one-eighth  longiu-  than  the  jjronotnm  ;  surface 
very  convex,  very  feebly  and  narrowly  impressed  on  the  suture  toward  the 
base,  coarsely  and  rather  closely  punctate  ;  ])unctures  very  deeply  imprissed, 
round,  rather  irregularly  distriliuted  ;  iiitersj)a(!es  very  convex.  Abdominal 
segments  decreasing  uniformly  and  very  gradually  in  width,  first  much 
narrower  than  the  contiguous  elytra,  cylindrical,  rather  strongly  constricted 
at  base;  bonier  obsolete;  surface  strongly,  closely,  and  evenly  i)unctate  ; 
punctures  but  slightly  smaller  than  those  of  the  pronotum  ;  traiTsverse 
carinae  not  cusped.  Legs  shnider,  piceous-brown,  bases  of  the  tibiae  j)aler  ; 
first  three  joints  of  the  posterior  tarsi  much  elongated,  uniformly  and  gradu- 
ally decreasing  in  length  ;  fourth  joints  moderately  bilobed. 

Mall-. — Posterior  edge  of  the  fifth  ventral  segment  narrowly,  roundly,  and 
rather  feebly  emarginate  in  the  niichlle  ;  sixth  narrow,  sinuate  at  apex,  sinus 
small,  acutely  rounded  at  the  bottom,  slightly  more  than  twice  as  wide  as 
deep. 

Female. — Sixth  segment  broadly  and  evenly  rounded  behind.   ' ' 

Length  2.8-3.4  mm. 

Michigan,  7 ;  Nebraska,  1  ;  Middle  States,  7  ;  District  of  Columbia, 
5;  Canada,  2  ;  Cambridge,  MiUisachusetts,  4;  Texas,  2. 

The  under  surface  of  the  abdomen  is  more  densely  pubescent  than 
the  upper.  The  species  resembles  ca/losus  (Er.),  hut  is  separated 
easily  by  the  male  sexual  characters  and  color  of  the  legs. 


I 


COLEOI'TKRA. 


189 


^ 


33.  A.  Iltinctaiflis  (Er.) — Form  inodcratfly  robust.  Pulx'sccnco  very 
Mpar.se,  fiiK^,  short,  evenly  di.strilmteil,  (birU  ciiieieous,  scarcely  visible;  entire 
surface  shiniiif;.  Head  somewhat  small,  nearly  twice  as  wide  as  Ion;;  ;  inter- 
ocular  surface  Hat,  nearly  three-fourths  wider  than  the  eye  ;  sulcations  almost 
entirely  obsolete;  intermediate  elevation  very  feebly  convex  ;  punctures  rather 
coarse,  st:ialler  and  much  closer  in  the  depressed  portions,  a  very  narrow  ir- 
regular median  line  is  almost  impunctate  ;  ocular  lines  meeting  at  one  length 
in  advauci;;  antennae  distinctly  longer  than  the  width  of  hefvd,  rather  slen- 
der, ))ali'  testaceous,  darker  at  tij) ;  basal  joints  twice  as  long  as  wide,  club 
jiromiuent ;  third  joint  two-lifths  longer  than  tbe  fourth,  eighth  shorter  and 
much  niort!  robust  than  the  seventh,  joints  of  club  much  elongated,  increas- 
ing rapidly  in  leniith,  (deventh  as  long  as  the  eighth  and  ninth  together; 
maxillary  j)al[>i  long,  first  and  second  joints  slendcu',  translucent,  pale  tlavo- 
testaceous,  tlm  latter  slightly  darker  toward  tip,  third  nearly  as  long  as  the 
first  two  together,  becoming  gradually  robust  towanl  tip,  sliglitly  darker, 
very  slender  at  base.  Prothorax  arcuately  and  very  gradually  increasing  in 
width  to  tbe  middle,  where  it  is  just  perceptibly  narrower  than  long;  sides 
tlience  slightly  convergent  posteriorly  and  distinctly  sinuate  ;  anterior  and 
posterior  margins  eijual  in  length  and  curvature,  feebly  arcuate  ;  surface 
evenly  and  strongly  convex,  rather  finely,  closely,  deeply,  an<l  evenly  ])unc- 
tate  ;  interspaces  convex,  nearly  equal  in  width  to  tbe  punctures.  Elytra  at 
base  about  equal  in  width  to  tbe  bead  ;  sides  very  feebly  divergent  posteriorly, 
very  slightly  longer  than  the  width  at  base,  rather  strongly  arcuate,  especi- 
ally toward  the  ajjici^s  •  together  broadly,  roundly,  and  moderately  emargi- 
nate  behind;  suture  nearly  one-third  longer  than  the  pronotum;  surface 
very  convex,  very  feebly  impressed  on  the  suture  at  tbe  base,  evenly,  deeply, 
and  moderately  coarsely  punctate  ;  punctures  dee])ly  impressed,  distant  by 
less  than  their  own  widtiis  ;  interspaces  very  strongly  convex.  Abdominal 
segments  decreasing  uniformly  and  very  gradually  in  width,  cylindrical, 
first  much  narrower  than  tbe  contiguous  elytra  ;  border  obsolete,  very  narrow 
on  the  first ;  surface  very  deeply,  coarsely,  closely,  and  evenly  punctate  ; 
interspaces  scarcity  one-half  as  wide  as  tbe  punctures  ;  transverse  carinne 
not  cusped,  strongly  and  finely  undulated.  Legs  slender,  rather  pale 
brownish-testaceous,  femora  very  slightly  darker  toward  tips,  tarsi  rather 
robust;  first  joint  of  the  posterior  as  long  as  the  next  two  together,  fourth 
joints  narrowly  and  not  very  conspicuously  bilobed. 

Male. — Sixth  ventral  segment  narrowly  and  deeply  incised  at  the  ajjex, 
incisure  about  twice  as  deep  as  wide,  sides  nearly  straight,  exterior  angles 
feisbly  rounded  ;  seventh  segment  broadly  and  evenly  emarginate  behind, 
lateral  teeth  distinct. 

Fewule, — Sixth  segment  broadly  and  evenly  rounded  behind. 

Length  3.0-3.3  mm. 

Micliigiin  and  Lake  Superior  (various  localities),  81  ;  Pennsyl- 
vania, .") ;  Willets  Point,  Lows  Island,  2  ;  New  Jersey,  1  ;  Cam- 
bridge, Massachusetts,  4;  Disi.irt  of  Columbia,  1. 

Appears  to  be  a  very  widely  distributed  sfiecies,  especially  in  the 
interior  of  the  continent.  The  forms  in  this  portion  of  the  genus  are 
80  extremely  closely  allied,  that  it  ia  a  matter  of  great  difficulty  to 


I'J 


190 


NORTH    AMERICAN 


1;^';! 


.1 


if 


rw 


hH 


1 ,1  .• , 


decide  upon  the  proper  specific  limits.  The  present  species  differs 
from  ohsoletns  only  in  its  more  robust  form,  especiidiy  of  the  protlio- 
rux,  and  in  its  coarser  punctuation.  Tiiere  seems  to  be  considerable 
variation  in  the  lustre,  the  males  being  more  polished  than  the  I'eniales. 

34.  A.  (liHsentienH  n.  S[). — Form  slender,  snli-cvlindrical.  I'nliesceneo 
moilerate  in  Icngtli,  sliglitly  denser  on  the  alpdoineii,  rather  sparse,  somewhat 
inconspiuuous  ;  entir«  surface  strongly  sliining.  Head  moderate  or  small, 
twice  as  wide  as  long  ;  interocular  surface  twice  as  wide  as  the  eye,  very 
I'eeMy  convex,  e(jually  trilohed  liy  the  very  feeble  sulcatioiis  ;  intermediate 
surface  moderately  and  nearly  evenly  convex,  narrowly  im[)unctate  along  the 
niidillt>;  punctures  rather  coarse,  deeply  ini])ressed,  rounded,  close  ;  ocular 
lin(!S  meeting  at  one  length  in  advance  ;  antennae  very  slightly  longtu-  than 
the  width  of  head,  rather  robust,  jticeo-testaceous  at  base,  becoming  dark 
piceous-brown  at  tip  of  tdub,  the  latter  compact  and  distinct;  third  joint 
slightly  more  than  ont-tbird  longer  than  tlie  fourth  ;  maxillary  palpi  v^'ry 
long,  slender,  piceo  tlavatt',  becoming  slightly  darker  toward  tip.  Prothorax 
arcuatety  and  evenly  increasing  in  width  to  a  point  nearly  two-thii'ds  the 
length  posteriorly,  where  it  is  slightly  narrower  than  long  ;  sides  thence 
feebly  convergent  and  slightly  sinuate  ;  anterior  margin  slightly  sliorter  and 
distinctly  more  arcuate  than  the  i)osteri(ir  :  surface  nearly  evenly  convex, 
very  feebly  and  transversely  Impressed  just  hehind  the  apex  ;  punctures 
moderate  in  size,  round,  rather  deeply  impressed,  very  close,  evenly  ilistri- 
butcd.  Elytra  at  base  as  wide  as  the  head  ;  sides  paralbd,  slightly  longer 
than  the  width  at  base,  rather  strcnigly  arcuate  toward  the  apices  ;  together 
broa<Uy,  somewhat  angularly  and  moderately  emarginate  behind  ;  suture 
ouc-fciurlh  longer  than  the  pronotum  ;  surface  rather  strongly  and  narrowly 
impressed  on  the  suture  toward  the  base,  also  feebly  imi)ressed  near  each 
humeral  angle  ;  i)unctures  coarse,  nearly  evenly  distributed,  round,  dHe])ly 
impressed,  distant  by  slightly  more  than  their  own  diameters.  Abdominal 
segments  decreasing  uniformly  and  gradually  in  width,  first  slightly  narrower 
than  the  contiguous  elytra,  cylindrical ;  border  obsolete  except  on  the  first 
segnuait ;  surface  coarsely,  closely,  deeply,  and  evenly  punctate  ;  transverse 
cai-inae  not  cusped,  unevenly  toothed.  Legs  short,  rather  slender,  piceo- 
fuscous  thougbout ;  lirst  threi^  joints  of  the  posterior  tarsi  decreasing  uni- 
forndy  and  rather  rapidly  in  length,  first  much  shorter  than  the  next  two 
together ;  fifth  as  long  as  the  lirst  three  together ;  fourth  joints  strongly 
bllobed. 

Male. — Unknown. 

F'liKile. — Sixth  ventral  segment  obtusely  rounded  behind,  slightly,  but 
rather  acutely  produced  at  tho  iunnediate  vertex. 

Length  2.7  ram.  .  ., 

Lake  Superior,  1. 

Thiit  species  in  jreneiai  appearance  resembles  poUtulus  from  Van- 
couver Island,  but  is  readily  distinguished  from  it  by  the  structure  of 
the  prothorax  and  posterior  tarsi,  also  by  that  of  the  interocular  sur- 
face of  the  head  and  the  maxillary  palpi. 


COLKOl'TEKA. 


191 


M 


35.  A.  Illlbbarili  n.  sp. — Form  ratlitT  lolnint.  Puboswico  very  (inf, 
short,  ratlicr  si>.irsi',  dark  ]i1uirilK'oiis,  scarcely  visililc  ;  entire  surface  very 
lii^lily  polished.  Head  small,  twico  ns  wide  as  loiijj  ;  iiiterociilar  surface 
twice  as  wide  as  the  eye.  Hat ;  snlcatioiis  hroailly  rounded,  narrow,  and  fetdtlo ; 
intermediate  siirfac('  narrow,  acutely  convex,  very  narrowly  iiiijuinctate 
aloiii;  the  middle  ;  j)\inctnres  rather  coarse,  deei>ly  impressed,  round,  nearly 
evenly  distributed,  distant  by  nearly  their  own  widths  ;  interspaces  conv(?x  ; 
ocular  lines  meetinij  at  nearly  two  lengths  in  advance:  lalniiin  small; 
antennae  very  slii,'htly  lon<,'er  than  the  width  of  head,  transltic<'nt,  dark 
piceo-testawous  toward  bast^,  iH^coniing  black  toward  tip,  club  rather  slen- 
der ;  third  joint  one-half  longer  than  the  fourth,  Joints  of  club  increasing 
rapidly  in  length,  sparingly  puhe.sc<'nt  ;  maxillary  i)ali)i  long  and  slender, 
first  joint  rather  dark  piceo-testact-ou.",  remainder  ilark  piceoiis-brown,  tliir<l 
joint  clothed  densely  with  cinereous,  setiform  pulx-scence.  Prothorax  widest 
at  th(i  middle,  where  it  is  scarcely  narrower  tlian  long;  sides  then<;i'  very 
feebly  convergent  and  straight  anteriorly,  slightly  more  convergent  and  just 
visibly  sinuato  posteriorly  ;  anterior  margin  slightly  longer  than  the  poste- 
rior, more  strongly  arcuate,  post<'rior  rather  strongly  arcuate  ;  surface  nearly 
nvenly  conv(^v  ;  punctures  rather  small,  <'venly  disti-ibuted,  ronn<l,  rather 
deeply  impressed,  distant  generally  by  nearly  their  own  widths.  Elytra  at 
base  very  slightly  wid(T  than  the  head ;  sides  nearly  parallel,  much  longer 
than  the  width  at  buse,  almost  straight  toward  the  hum<>ral  angles,  strongly 
arcuate  toward  the  aj)ic<'s  ;  outer  apical  angles  very  acute  and  i)romiiient  ; 
together  broadly,  roundly,  iiid  rather  feebly  emarginate  Itehind  ;  suture 
one-third  longer  than  the  pronotuin;  surface  strongly  conv<'x,  very  feebly 
impressed  on  the  suture  toward  the  base;  punctures  round,  very  deeply 
impressod,  nearly  evenly  distributod,  distant  hy  much  less  than  tlieir  own 
widths;  interspaces  very  convex.  Sides  of  the  abdomen  slightly  inwardly 
ourvate;  lirst  segment  slightly  narrower  than  the  contiguous  tdytra,  third 
and  fourth  equal  in  width,  narrower  than  the  first,  all  strongly  constricted 
at  base,  cylindrical ;  transverse  carinae  not  cusped  :  surfac(?  very  strongly, 
closely,-  and  evi'uly  punctate  ;  punctures  nearly  as  large  as  those  of  the 
elytra;  int<^rspac<>s  alniut  one-half  as  wide  as  the  punctures,  very  convc^x. 
Legs  rather  short  and  robust,  very  dark  fuscous  throughout  in  color ;  first 
joint  of  the  posterior  tarsi  two-thirds  as  long  as  the  fifth,  much  shorter  than 
the  second  and  third  together ;  lobes  of  fourth  joints  very  long  and  narrow. 

Male. — Fifth  ventral  segment  very  narrowly  emarginate  in  the  middle  of 
its  posterior  edge,  emargination  more  acutely  rounded  at  the  bottom  than  at 
th»>  sides,  minute,  alwut  five  times  as  wide  as  deep  ;  sixth  segment  narrowly 
and  very  deeply  incised  at  the  apex,  incisure  nearly  twice  as  deep  as  wide, 
sides  straight,  exterior  angles  very  feebly  roundtnl ;  seventh  segment  broadly, 
roundly,  and  strongly  enmrginate  at  tip,  edges  of  emargination  undulated  at 
the  bottom,  lateral  teeth  strung,  broad  at  base,  straight. 

/■hndle. — Unknown.     -■'/-• 

Length  2.8  mm. 

Batclieliwauung  Bay,  Lake  Superior,  1. 

The  distinguishing  features  of  this  vefy  distinct  species  lie  in  the 
very  robust  prothorax,  proportionally  long  elytra,  antennae  black  in 


\  i 


Hh 


,'i'( 


%  if 


192 


NOKTII    AMERICAN 


llic  distal  liiilf,  uiid  in  tlie  very  strong  punctuation  of  tlie  under  surface 
of  tiie  tilxlonicn  in  tiic  males. 

Dt'(licat«Ml  to  Mr.  II.  (i.  Iluhhanl,  to  wlioso  scientific  collecting  in 
this  portion  of  tin;  country,  a  great  deal  of  the  existing  material  is  due. 

3(1.  A*  laetlllllH  II.  sp. — Form  rattier  slender,  sul^cyliiidrieal.  I'libes- 
cenct)  riKideriite  in  leiiu'tli,  .sllli-rci'iinilM'iit,  excc.i.sively  spiirse,  i>lmiil>e(>-ciiu'- 
reoiis.  Head  moderate,  twice  as  wide  as  loiij;  ;  intiToi'iiiar  snrt'act!  tlat,  twice 
as  wide  as  tlie  eye  ;  longitudinal  elevation  narrower  than  the  lateral  [vortions, 
very  stronj^ly  and  evenly  eonvex,  entirely  iutjunu'tate  and  very  lii^lily 
jioIIsIkmI  ;  sulcTtions  eonver;j;ent  anteriorly,  stronj;  ;  lateral  loWs  cfinvex 
with  a  very  few  widely  seiiurated,  small,  deeply  impressed  punctures;  inter- 
spaces very  wid«,  convex,  and  highly  polished  ;  su])ra-nntei)nal  tubercula- 
tions  very  pron\inent,  highly  polished,  and  intpnnctatc!,  separated  from  the 
eyes  by  short  sulcations  ;  ocnlar  lines  ineeti)ig  at  one  length  in  advance; 
antennae  longer  than  the  width  of  head,  very  pale  rwldish-testaceous 
throughout,  slender,  club  moderate;  third  joint  one-third  longer  than  the 
t'(;iirth,  fourth  and  tifth  sub-eijual,  sixth  much  longer  and  very  slightly 
narrower  than  the  seventh,  eighth  distinctly  shorter  than  the  seventh,  equal 
to  it  in  width,  joints  of  clul)  increasing  in  length,  elongated,  sub-cylindi'ical, 
v(My  sparstdy  jiubescent  ;  maxillary  palpi  elong;Ued,  i>ale  j>iceo-testaceous 
throughout.  Prothorax  widest  at  the  middle,  where  it  is  four- tilths  as  wide 
as  the  head  and  slightly  narrower  tliau  long;  sides  thence  very  fetdily  con- 
vergent posteriorly  and  feebly  sinuate  ;  anterior  margin  slightly  shorter  and 
more  arcuate  than  the  i)osterior  ;  surface  evenly  convex,  very  sparsely  and 
uueiiually  punctate;  punctures  very  deej)ly  impressed,  round  ;  intersj)aces 
convex  and  extremely  highly  polished.  Elytra  at  base  very  slightly  wider 
than  the  heail  ;  sides  very  feebly  divergent  posteriorly,  as  long  as  the  width 
at  base,  very  strongly  and  evenly  arcuate  ;  together  broadly  and  rather 
strongly  emarginato  behind  ;  suture  one-sixth  h)nger  than  the  pronotuni ; 
surface  strongly  convex,  very  feeldy  and  narrowly  impressed  on  the.  suture 
at  the  base  ;  sparsely,  coarsely,  and  somewhat  evenly  punctate  ;  punctures 
round,  wid(dy  isolated,  very  deeply  impressed  ;  interspaces  very  convex, 
wider  than  the  punctures,  highly  polished.  Abdominal  segments  cylindri- 
cal, (hx-reasing  uniformly  and  rapidly  in  width,  tirst  much  narrower  than  the 
contiguous  elytra  ;  surface  very  highly  polished,  very  finely  and  sparsely 
punctulate  ;  border  obsob'te,  except  along  the  llrst  segment  ;  transverse 
cariuae  tridentate,  teeth  very  broadly  rounded,  short  and  rudii\ieutary. 
Legs  slender,  piceous-brown  ;  first  joint  of  the  jxisterior  tarsi  distinctly  longer 
than  the  next  two  together  ;   fourth  joints  deeply  bilobed,  lobes  slender. 

Mali-. — l^ixth  ventral  segment  very  narrow,  truncate  at  tip,  where  it  is 
bilobed,  cusi)  small  but  distinct,  acute. 

Fimiili'. — Sixth  segment  very  broadly  and  evenly  rounded  behind. 

Length  3.0-3.1  mm. 

California  (S.  Buenaventura),  G.  ,  '.         ;.      ;>' 

The  under  surface  of  the  abdomen  is  very  sparsely  punctate,  more 
densely  so  on  the  last  two  segments  ;  extremely  highly  polislied. 


COI.EOPTEUA. 


193 


more 


37.  A*  leviceps  n.  Hp. — Form  rather  slender  ;  abdomen  large.  Pubes- 
cence short,  erect,  fine,  extremely  sparse  ;  surface  polished.  Head  very 
small,  twice  as  wide  as  long;  iuterocular  surface  very  feebly  convex,  nearly 
twice  as  wide  as  the  eye;  longitudinal  elevation  feeble,  crest  broadly  ini- 
punctate,  slightly  wider  than  the  lateral  portions  ;  sulcatioiis  very  feeble ; 
punctures  coarse,  sparse,  deep,  closer  .n  the  depressed  portions  ;  ocular  lines 
very  convergent,  meeting  at  about  one  length  in  advanct^ ;  antennae  ratlier 
short  and  robust,  piceous-brown,  slightly  darker  toward  the  clul),  the  latter 
not  abrupt  ;  third  joint  scarcely  one-third  longer  than  the  fourtli,  eighth 
mon^  robust  than  the  seventh,  slightly  elongated  ;  maxillary  jialpi  long, 
slender,  third  joint  strongly  clul)l)od  ;  piceous  throughout,  basal  joint  very 
slightly  paler.  Prothorax  small,  robust,  widest  slightly  behind  the  middle, 
where  it  is  as  wide  as  long  ;  sides  thence  very  feebly  convergent  posteriorly 
and  very  slightly  sinuate  ;  anterior  anil  posterior  margins  very  long,  sub- 
equal,  strongly  arcuate ;  surface  coarsely,  rather  loosely,  and  very  irregularly 
punctate  ;  interspaces  convex.  Elytra  at  base  distinctly  wider  than  the 
head ;  sides  feebly  divergent  posteiiorly,  distinctly  longer  than  the  width  at 
base,  strongly  arcuate  near  the  aj)iccs  ;  together  broadly  and  very  strongly 
emarginate  behind ;  suture  one-third  longer  than  the  pronotum ;  surface 
very  narrowly  and  feebly  impressed  along  the  suture ;  each  elytron  is  also 
impressed  just  in  advance  of  the  middh;  point,  and  also  very  irregularly  so 
just  behind  the  middle  and  near  the  exterior  margins  ;  coarsely,  very  deeply 
punct.-'.to  ;  punctures  round,  nearly  evenly  distributed,  distant  by  slightly 
more  than  their  own  widths  ;  interspaces  convex.  Abdominal  segments 
decreasing  uniformly  and  somewhat  rapidly  in  width,  first  very  slightly 
narrower  than  the  contiguous  elytra ;  surface  cylindrical  ;  border  obsolete 
except  on  the  first  segment,  where  it  is  very  narrow  ;  punctures  round, 
deeply  impressed,  rather  sparse,  evenly  distributed  ;  transverse  carinae 
strongly  and  finely  undulated  throughout.  Legs  very  slender,  black  above, 
tarsi  and  under  surface  of  the  femora  and  tibiae  dark  fuscous  or  piceous- 
brown  ;  first  joint  of  the  posterior  tarsi  about  as  long  as  the  next  two 
together ;  fourth  joints  bilobed,  lobes  rather  inconspicuous  ;  claws  very 
slender,  sti'ongly  curvate,  bulbous  at  the  base. 

Male. — Unknown. 

Female. — Sixth  ventral  segment  very  obtusely  and  evenly  rounded  behind. 

Length  2.8  mm. 

Vancouver  Island,  British  Columbia,  1. 

Very  readily  distinguished  from  IcRtuhis,  which  it  somewliat  re.^em- 
bles  by  its  very  small  head,  and  somewhat  finer  and  closer  elytral 
punctuation. 

38.  A«  politlllus  n.  sp. — Form  rather  slender.  Pubescence  very  sparse 
and  inconspicuous  ;  surface  very  highly  polished  througliout.  Head  small, 
about  twice  as  wide  as  long  ;  interocular  surface  scarcely  twice  as  wide  as  the 
eye,  nearly  flat ;  sulcations  obsolete ;.  longitudinal  elevation  very  narrow, 
impunctate  and  rather  distinct ;  punctures  very  coarse,  deeply  impressed, 
nearly  evenly  distributed,  close;  interspaces  convex;  ocular  lines  meeting 
at  one  length  in  advance,  nearly  straight ;  antennae  as  long  as  the  width  of 
Stesixi.  13 


;' 


194 


NORTH    AMERICAN 


i 


lioad,  (lark  piceous-brown,  pivliT  toward  tlio  bant',  somewhat  slender,  club 
modcratis  tliird  joint  sdijjbtly  niori'  tliim  om'-bnlf  longer  than  tlic  fonctli  ; 
maxillary  palid  well  dovulopod,  dark  pict'oiis-brown,  gradually  becoming 
Kli<,'litly  juiler  toward  the  base,  tliird  joint  robust  toward  tip.  Prothorax 
nvciily  ariMiatcly  and  very  gradually  increasing  in  width  to  tho  middle, 
wlicre  it  is  as  wide  as  long;  sides  thence  very  feebly  convergent  posteriorly 
and  rather  strongly  sinuato  ;  anterior  and  posterior  iuargins  equal  in  len;,'th 
and  curvature,  very  feebly  arcuate  ;  surface  di'uscly,  coarsely,  deejjly,  closely, 
and  nearly  evenly  i>unctate.  Elytra  at  base  slightly  wider  than  the  liead  ; 
sides  parallel,  slightly  longer  than  the  width  at  base,  rather  strongly  arcuate, 
esi)ecially  toward  the  apices  ;  together  broadly,  roundly,  and  moderately 
emarginate  behind  ;  suture  slightly  more  than  one-third  longer  than  tho 
pronotum  ;  surface  narrowly  and  feebly  impressed  along  the  suture,  espe- 
cially toward  the  base,  coarsely  and  evenly  punctate  ;  ])unctures  very  deeply 
imju'essed,  round,  distant  by  slightly  less  than  their  own  diameters  ;  inter- 
spaces strongly  convex.  Abdominal  segments  decreasing  uniformly  aiul 
extrtimely  slowly  in  width,  cylindrical,  first  slightly  narrower  than  th(*  con- 
tiguous elytra,  eaoli  distinctly  constricted  at  base  ;  border  obsolete  except  on 
the  first  segment ;  surface  uniformly  closely  and  coarsely  jnmctate  ;  intervals 
moderately  convex  ;  transverse  cavinae  not  cusped.  Legs  rather  short,  slen- 
der, piceous-blaok  at  the  coxae,  gradually  becoming  slightly  paler  toward 
the  claws  ;  first  joint  of  the  posterior  tarsi  as  long  as  the  next  two  together, 
second  and  third  equal,  as  wide  as  long ;   fourth  joints  strongly  bilobed, 

Aldle. — Posterior  edge  of  the  fifth  ventral  segment  feebly,  narrowly,  and 
roundly  emarginate  in  the  middle  ;  sixth  very  strongly,  deeply,  and  rather 
narrowly  sinuate  at  tip,  sinus  rather  acutely  rounded  at  the  bottom,  more 
than  one-half  deeper  than  wide  ;  seventh  segment  broadly,  roundly,  and 
distinctly  emarginate  at  tip,  lateral  teeth  well  developed. 

Female. — Sixth  segment  very  broadly  and  obtusely  rounded  behind,  with 
indications  of  an  obtusely  rounded  production  in  the  middle. 

Length  3.0  mm.  ,     . 

Vancouver  Island,  British  Columbia,  5. 


II 


39.  A»  simiolllS  n.  sp.—Form  robust.  Pubescence  very  short,  sparse, 
rather  fine,  dark  piceo-pluinbeus,  scarcely  visible ;  entire  body  very  highly 
polished.  Head  small,  robust,  much  less  than  twice  as  wide  as  long  ;  inter- 
ocular  surface  nearly  fiat,  obscnre  ;  intermediate  snrfaoe  rather  strongly, 
narrowly,  and  acutely  convex;  punctures  rather  large,  evenly  distributed, 
deeply  impressed,  round,  separated  by  much  less  than  their  own  widths  ; 
interspaces  strongly  convex  ;  ocular  lines  meeting  at  nearly  two  lengths  in 
advance  ;  eyes  large,  thick  ;  antennae  short  and  robust,  as  long  as  the  width 
of  head,  rather  pale  piceous-brown  at  base,  becoming  almost  black  at  tip, 
club  rather  prominent ;  third  joint  one-third  longer  than  tho  fourth,  seventh 
three-fourths  longer  than  the  eighth,  equal  in  thickness,  eighth  as  wide  as 
long,  nearly  sub-quadrate,  ninth  and  tenth  nearly  equal  in  length,  eleventh 
much  longer  ;  maxillary  palpi  moderate  in  length,  very  slender,  rather  pale 
piceous-brown,  becoming  slightly  paler  toward  the  base.  Prothorax  robust, 
widest  at  the  middle,  where  it  is  about  as  wide  as  long ;  sides  thence  equally 


COLEOPTKUA. 


105 


convergent  anteriorly  and  postt>riorly,  sli<;litly  arcnntc  In  tlio  former,  nearly 
Htraiglit  in  tlio  latter  diniution  ;  anterior  ami  juisterior  niar^'ins  e<iiinl  in 
length,  the  latter  very  slightly  the  more  nrciiate  ;  surface  rather  feebly  and 
transvttrsely  inii)rcsHe(l  just  lieliind  the  a]iex,  otherwise  evenly  cjonvex ; 
pun(!tures  rather  small,  even,  round,  distant  by  nearly  their  own  widths; 
interspaces  nuiderately  convex.  Elytra  at  base  distinctly  wider  than  the 
head;  sides  extremely  feebly  divergent  posteriorly,  ecjual  in  length  to  thu 
width  at  base,  strongly  arcuate  ;  togetlu^r  broadly,  roundly,  and  strongly 
emarginate  behind;  suture  one-fourth  longer  than  tlie  pronotum;  surface 
very  convex,  broadly  and  very  fec'bly  impressed  along  the  suture  ;  punctures 
rather  coarse,  even,  round,  deeply  impressed,  distant  by  their  own  widths; 
interspac(>s  very  convex.  Abdominal  segments  decreasing  at  first  rather 
rapidly,  then  more  slowly  in  width,  cylindrical,  first  very  slightly  narrower 
than  the  contiguous  elytra;  surface  rather  closely  and  evenly  punctate; 
punctures  as  larg**  as  those  of  the  pronotum,  distatit  by  slightly  more  than 
their  own  widths  ;  interspaces  convex  ;  transverse  carinae  not  cusped,  finely 
and  strongly  undulated  posteriorly.  Legs  short  and  slender,  femora  piceous- 
Idack  above,  dark  fuscous  beneath,  tibiae  dark  fuscous,  distal  extremity  and 
tarsi  very  slightly  paler,  the  latter  slend(?r  ;  first  joint  of  the  posterior  nearly 
as  long  as  the  next  two  together,  shorter  than  the  last ;  claws  strongly  cur- 
vate,  slender,  abruptly  enlarged  at  the  base. 

Mule. — Unknown. 

Female. — Sixth  ventral  segment  broadly  rounded  behind. 

Length  2.9  mm. 

White  Fisli  Point,  Lake  Superior,  4. 

This  species  can  be  ilistinf»iiislied  from  Ilnhhardi  and  punctatiis  by 
its  relatively  miicli  more  robust  form  and  smaller  iiead.  in  addition 
it  differs  from  the  first  in  its  relatively  shorter  elytra,  which  are  also 
mncli  more  stronj^ly  emarginate  behind,  and  from  the  latter,  in  its 
<lark  legs  and  antennae,  relatively  shorter,  more  robust  prutliorax, 
and  more  convex  elytra. 


40.  A.  pertinax  n.  sp. — Fusiform,  robust.  Pubescence  cinereous,  short, 
semi-erect,  coarse,  uniformly  distributed,  rather  conspicuous.  Head  very 
small,  twice  as  wide  as  long ;  interocular  surface  twice  as  wide  as  the  eye, 
very  feebly  convex  ;  punctures  uniformly  distributed,  coarse,  round,  deeply 
impressed,  distant  by  less  than  their  own  widths  ;  interspaces  narrow,  con- 
vex and  polished  ;  sulcations  almost  obsolete;  ocular  lines  meeting  at  about 
one  length  in  advance  ;  antennae  much  longer  than  the  width  of  head,  testa- 
ceous, club  very  slightly  darker  ;  third  joint  scarcely  one-fourth  longer  than 
the  fourth  ;  maxillary  palpi  very  long,  piceo-testaceous,  first  joint  paler,  third 
nearly  as  long  as  the  first  two  together.  Prothorax  arcuately,  evenly,  and 
rapidly  increasing  in  width  to  the  middle,  where  it  is  about  as  wide  as  long ' 
and  but  slightly  narrower  than  the  head  ;  sides  thence  feebly  convergent 
posteriorly  and  sinuate  ;  posterior  angles  prominent ;  anterior  margin  slightly 
shorter  than  the  posterior,  equally  and  distinctly  arcuate ;  surface  trans- 
versely and  feebly  impressed  just  behind  the  apex,  otherwise  evenly  convex  ; 


i:> 


I 


|i* 


19G 


NO;   ni    AMKKICAN 


punctunm  Hinall,  roiimltMl,  riithcr  olose,  oucnRionally  cunlcHcnnt  on  tlio  flankH ; 
iiitcrHpncutt  IVoltly  uoiivt'x,  liit^lily  {lolislii'd.  Elytra  iil  bunt*  iiioro  tlian  one- 
fourth  wider  than  th»i  hcail  ;  wiih's  jiarallttl,  I'l'ijhly  arcMiate,  morn  Htrongly 
HO  jiorttt'riorly,  alxnit  (-(lual  in  hHigtii  to  tho  widtii  al  hano ;  together  hrondly, 
angularly  TvUiI  sonii-wiiat  Htrongly  eniarginatu  htdiind  ;  outer  a]>i('al  angles 
aeiite ;  suture  ahdiit  two-lifth.s  longer  than  tlio  jironotuni ;  surlaco  convex, 
broadly  and  di.stincily  impreMst-d  on  the  suture  at  the  base ;  ininctures 
HUiall,  round,  evenly  <liHtributf(l,  deeply  impressed,  dJHtant  by  about  their 
own  widths;  interspaces  highly  polished  anil  moderately  convex.  Ab 
minal  seginontfl  ducreasing  uniformly  and  rather  ra])idly  in  width,  llrst 
slightly  narrower  than  the  contiguous  t^lylra,  cylindrical,  slightly  constricted 
at  base  ;  surface  coarsely,  very  cdosely,  and  (evenly  puuctulate,  api)earing  as 
if  perforated  ;  lateral  border  obsolete  ;  transverse  carinae  not  cusped.  Legs 
short  and  slender,  piceons-black  above,  slightly  paler  fuscous  beiu-ath  ;  lirst 
joint  of  the  postiM'ior  tarsi  slightly  longer  than  the  next  two  together.  Under 
surface  of  the  abdomen  very  closely,  coarsely,  and  evenly  punctate,  appear- 
ing as  if  perf(U-ated. 

Mule, — Unknown. 

Female. — Sixth  ventral  segment  very  obtusely  rounded  behind. 

Length  3.2  nun. 

Wyoming  Territory,  1. 

This  species  cun  be  readily  identified  by  its  very  peculiar  robust 
fusiform  shape,  small  head,  and  deep  close  punctuation  on  the  under 
surface  of  the  abilonien. 


If 
1 


■•I 
'I 


hi 


41.  A.  lucidus  n.  sp. — Foini  robust,  convex.  Pubescence  excessively 
sparse,  short,  and  inconspicuous  ;  entire  surface  very  highly  polished.  Head 
small,  robust,  scarcely  twice  as  wide  as  long  ;  interocular  surface  twice  as 
wide  as  the  eye,  very  feebly  convex,  equally  divided  by  the  sulcations,  which 
are  nearly  obsolete ;  intermediate  surface  evenly  and  distinctly  convex  ; 
punctures  small,  distant,  except  in  the  suh^ations,  where  they  are  closely 
crowded  ;  ocular  lines  meeting  at  nearly  two  lengths  in  advance  ;  antennae 
short,  scarcely  longer  than  the  width  of  head,  slender,  dark  i)iceo-teataceous 
throughout,  club  small ;  third  joint  one-fourth  longer  than  the  fourth,  fourth 
and  fifth  equal  in  length,  joints  of  club  slightly  elongated,  last  two  equal 
in  thickness  and  more  robust  than  the  ninth  ;  maxillary  palpi  long,  dark 
piceous-brown,  basal  joint  very  slightly  paler.  Prothorax  arcuately,  evenly, 
and  rather  rapidly  increasing  in  width  to  a  point  very  slightly  in  advance  of 
the  middle, where  it  is  about  as  wide  as  long  ;  sides  thence  rather  less  rapidly 
convergent  posteriorly  and  very  feebly  sinuate ;  anterior  margin  very  slightly 
shorter  and  more  arcuate  than  the  posterior  ;  surface  feebly  impressed  just 
behind  the  anterior  margin,  otherwise  evenly  convex,  finely  punctate  ;  punc- 
tures round,  deeply  impressed,  rather  close,  somewhat  unevenly  distributed  ; 
a  narrow  fusiform  space  in  the  middle  is  impunctate.  Elytra  at  base  dis- 
tinctly wider  than  the  head  ;  sides  very  feebly  divergent  posteriorly,  strongly 
arcuate,  more  especially  near  the  apices,  about  equal  in  length  to  the  widtli 
at  base;  together  broadly,  roundly,  and  rather  strongly  emarginate  behind  ; 


i! 


COLEOPTEnA. 


107 


mitnro  ntmrly  oiin-lialf  IniiftiT  than  tin'  pronntum  ;  unrfnoo  v«»ry  coiivvx, 
rntlnT  Mtroii^ly  iiii|)n'HMi'<l  on  tlm  Hiiturc  toward  tni«  basn,  «>ai!h  elytron 
ohliqiii'ly  mill  Hoiiii'wliat  ffohly  iniprt'HMHd  in  front  of  the  middle;  ])uiii'tnr<>!4 
Hiiiall,  round,  di'i-ply  inipri'ssi'(l,  distant  liy  more  flian  ttn-ir  own  uidtliH, 
iii'arly  I'vcniy  distrilpiilcd.  Abdominal  s('i,'nii'nts  ilfcircasiiij^  nnifnnidy  and 
rntlier  rapidly  in  wiiltli,  flrwt  tdifjlitly  narrower  than  tin*  contijjnoim  elytra, 
nearly  eylindrical,  each  segment  rather  stron>,'ly  constr'  -'ed  at  Imito  ;  Kiirface 
very  coarsely,  rather  elusely  and  evi-nly  pnnetnlate;  >  ctnres  at  hase  na 
larjje  as  those  of  the  elytra  ;  Imrder  olisnlete  ;  transverse  .  arinae  not  cusped. 
Lega  short  and  slender,  femora  anil  tihiae  l)la(^k,  tarsi  pnler,  piceons  ;  lirst 
three  joints  of  tho  jiosterior  »;niformly  and  very  rapiilly  decreasing  in  loiigth  ; 
fonrth  joints  stron^jly  hilohed,  hdn-s  narrow  and  very  lonjj. 

Miilf. — Unknown, 

Fi'vidle. — Sixth  ventral  segment  very  obtusely  and  somewhat  angularly 
rounded  hehind, 

Len^'th  2.9  mm. 

Oak  Gr<)v«,  California,  2. 

Tlu!  above-described  type  lias  been  lost;  tbe  second  8|)ecimen  is 
believed  to  represent  tlie  species,  aUbong!;  i;  is  more  slender  than  the 
original  fy|)e.  The  species  cannot,  however,  be  very  readily  inis- 
^    taken  for  any  other  of  that  region. 


Unrecognized  Species. 

The  following  is  the  only  species  which  I  have  not  succeeded  in 
fully  identifying.  The  original  description  of  lioheman  is  transcribed 
without  alteration,  except  in  the  portions  between  brackets: — 

[Areiis]  clialybeus  Boh. 
Res.  Engen.  1858,  p.  33. 

Caeruleus,  nitidus,  glaber;  antennis  palpis  pedibusque  dilute  flavis, 
illis  antrorsum  leviter  infuscatis;  fronte  plana,  punctata,  medio  cari- 
nata ;  prothorace  confertim  punctate,  postice  leviter  carinato;  elytris 
prothorace  nonnihil  brevioribus,  fortiter,  crebre  punctatis  ;  abdomine 
immargiuato,  coracino,  parce  subtiliterque  punctulato. — Long.  4J, 
lat.  ^  millim. 

Patria :  California  (St:  Francisco). 

Caput  prothorace  sesquilatiiia,  obscure  caeruleum,  nitidum,  crebre,  sat 
distincte  punctatum,  antice  subtiliter  albido-pubescens  ;  fronte  plana,  medio 
linea  longitudinali,  laevi,  modice  elevata.  Palpi  dilute  flavescentes.  An- 
tennae modioe  elougatae,  tenues,  dilute  Havae,  extroraum  leviter  infuscatae, 
articulo  tertio  quarto  nonnihil  longiore.  Prothorax  elytris  fere  duplo  angus- 
tior,  ublongus,  latitudine  duplo  longior,  apice  rotundatus,  basi  truncatus, 


li " 


198 


NORTH    AMERICAN 


latoribus  medio  panim  rotumlato-ampliatus  ;  suporiio  convexua,  caerulous, 
nitidus,  crebre,  sat  profinule  punctatni:,  dorso  jiostico  obsolete,  longitudi- 
iialiter  carinatus.  Souti'lluin  v.>:  ooiispicuuni.  Klytra  protliorace  dui.lo 
latiora  et  illo  vix  breviora,  lateribus  recta,  apice  truncata,  superne  leviter 
convexa,  oaerulea,  iiitida,  profiiudo,  crebre  punctata,  hunierirt  fere  rectangu- 
laribus,  e'o'  itis.  Abdomen  elytris  aiignstiiis,  immarginatnm,  eloiigatnm, 
cyliiidricmu,  iiigro-caeruleiim,  nitidum,  .  iibtilissime,  crebrci  punctuliftuui, 
segmentis  qixatuor  primis  coiistrictis.  Pedes  modice  elongati,  dilute  llavi, 
coxis  anticis  concoloribus  ;  tarsis  longioriburi,  articulo  quarto  profunde  bilobo. 

As  tliis  description  is  full,  clear,  iiiiil  succinct,  and  does  not  corre- 
poond  witii  any  I'orm  known  from  tiie  Pacific  Coast,  even  in  its 
general  character,  I  am  strongly  inclined  to  believe  that  tiie  locality 
is  erroneous,  and  consequently  no  number  is  attached,  it  being  pre- 
ferable to  consider  it  at  present  as  a  doubtful  species. 


Total  number  of  species  described 172 

Total  number  of  specimens  enumerated 1497 

Number  of  species  described  from  5  or  more  specimens 70 

Number  described  from  4  specimens 4 

Number  described  from  3  specimens 7 

Number  described  from  2  specimens 28 

Number  described  from  1  specimen HS 

Number  not  seen ;  description  transcribed 5 


.-.i  :  K 


COLEOPTEUA. 


109 


ruleus, 
gitudi- 
iiiij,!o 
loviter 
:tiuiga- 
Ij.atum, 
Ifftuni, 
B  llavi, 
bilobo. 

corre- 
in  its 
)cality 
g  pre- 


.  * 


■  'ii.   ' 


LIST  OF  SPECIES  DESCRIBED. 

SyXONYMV  AM)  ]}lULIOORAPHY. 

Note. — Tli«  names  denoting  tlie  localitiea  are  indicative  of  regions,  and 
are  self-explanatory. 

DIANOUS. 

1.  D.  nitldulua  Lee— Proc.  Cost.  Soc.  Nat.  Hist.  1S74,  xvi.  p.  272. 

Atlantic,  Rocky  Mts. 

2.  D.  chalybeus  Lee— New  Sp.  Col.  L  1863,  p.  49 Lakes. 

3.  D.  zephyrus  n.  sp Pacilic. 

STENUS. 

A. 

1.  S.  puuctlger  n.  sp. — (Fauvel  i.  litt.) Rocky  Mts. 

2.  S.  b'punctatus  Kr. — Kiif.  Mark.  I.  p.  530 Athintic,  Lakes,  Pacific. 

comma  Lee. — New  Sp.  Col.  I.  18l!3,  p.  iiO. 

3.  S.  oolon  Say— Trans.  Am.  Phil.  Soc.  IV.  p.  458. ..Atlantic,  Cnilf,  Lakes. 

4.  S.  renifer  Leo.— New  Sp.  Col.  I.  1863,  p.  50 Gulf,  Arizona. 

5.  S.  semicolon — 1.  c.  p.  50 Atlantic,  Gulf,  Lakes. 

6.  S.  gemmeuB  n.  sp Atlantic. 

7.  S.  bilentigatus  n.  sp Atlantic. 

B. 

At 

8.  S.  sculptilis  n.  sp..., Pacific. 

9.  8.  laccophilus  n.  sp Lakes. 

10.  S.  juno  (Fal).)— Syst.  El.  IL  p.  602 Atlantic,  Gulf,  Lakes,  Pacific. 

11.  S.  verticosus  n.  sp Pacific. 

12.  S.  tristia  n.  sp Pacific. 

13.  S.  Austin!  n.  sp Atlantic,  Lakes,  Pacific. 

14.  S.  ranopa  n.  sp. Atlantic. 

15.  S.  delavrarensia  n.  nn Atlantic. 

16.  S.  sectator  n.  sp Pacific. 

17.  S.  zunicua  n.  sp Arizona. 

18.  S.  femoratUB  Say — Trans.  Am.  Phil.  Soc.  IV.  p.  459... Atlantic,  Lakes. 

19.  &.  tacomae  n.  sp Pacific. 

20.  S.  strangulatUB  n.  sp. — (Fauvel  1.  litt.) Atlantic,  Lakes. 

21.  S.  tenuis  n.  sp Lakes. 


w 


J-4 


200  .                       NORTH    AMERICAN 

22.  S.  angUBtuB  n.  sp Atlantic,  Lakes. 

23.  S.  difflcilis  11.  Hp.— (Sdiwaiz  i.  litt.) Atlantic,  Lakes. 

24.  S.  Pettiti  n.  sp Atlantic,  Lakes. 

2').  S.  BoriipeuB  n.  sp Lakes. 

20.  S.  intrusuB  u.  sp Atlantic,  Lakes. 

27.  S.  erythropuB  Mels — Pioc.  Ac.  Pliil.  H.  p.  40 Atlantic,  Lakes. 

j'linci/tf's  Mcls. — Cat.  1:?4.'). 

28.  S.  rugifer  ii.  sp. — (Faiivel  i.  litt.) Rocky  Mts. 

29.  S.  anaBtomozanB  ii.  sp. — (Crotch  i.  litt.; Atlantic. 

30.  S.  BhoshoniB  ii.  sp Pacilic. 

31.  S.  inBulariB  n.  sp Pacific. 

32.  S.  vexatUB  ii.  sp Pacific. 

33.  S.  Schwarzi  n.  sp. — (Pauvd  i.  litt.) Atlantic. 

34.  S.  pauper  n.  sp Atlantic. 

3").  S.  BubtiliB  11.  sp Lakes. 

3G.  a.  indigenB  n.  sp Atlantic. 

37.  S.  simplex  n.  sp. — (Crotch  i.  litt.) Pacific. 

38.  3.  vicinuB  n.  sp Atlantic,  (iulf. 

30.  S.  ingratuB  n.  sp Lakes. 

40.  S.  neglectUB  n.  sp Atlantic,  Lakes. 

41.  S.  Bcabiosua  n.  sp Lakes. 

42.  S.  vespertinus  n.  sp Pacific. 

43.  S.  convictor  n.  sp Pacific. 

44.  S.  deductor  n.  sp Lakes. 

roiifiisits — This  work,  pp.  38  and  ()3. 

45.  S.  IhornatuB  n.  sp. — (Scliwar/.  i.  litt.) Atlantic,  Lakes. 

4().  S.  placiduB  n.  sp Lakes. 

47.  S.  mendaz  n.  sp Atlantic. 

48.  S.  erienBiB  n.  sp Lakes. 

41).  S.  sphaeropB  n.  sp Atlantic. 

r)0.  S.  militaris  n.  sp Lakes. 

.Ol.  S.  pluto  n.  sp Atlantic. 

r)2.  S.  incultUB  n.  sp Arizona. 

53.  S.  pterobrachys  (f.  ami  11 Pacific. 

hrfripniiiis  Milkl.— Hull.  Mosc.  1852,  II.  p.  318. 

54.  S.  corvus  ii.  sp. — (Schwarz  i.  litt.) Pacific. 

55.  S.  maritimus  Mots.— Hull.  Mosc.  1845,  IV.  p.  35G Pacific. 

5(5.  S.  montanuB  n.  sp. — (Schwarz  i.  litt.) Atlantic. 

57.  S.  alpicola  Fvl.— Faun.  G.-Rli.  III.  p.  230 Kocky  Mts.,  Pacific. 

58.  S.  coBtallB  11.  sp Pacific. 

59.  S.  alveolatuB  n.  sp Pacific. 

60.  S.  ellipticUB  n.  sp Pacific. 

61.  S.  adelops  n.  sp Pacific. 

62.  S.  luctuoBUB  n.  sp Pacific. 

63.  S.  puaio  n.  sp. — (Schwarz  i.  litt.) Atlantic,  Lakes. 

64.  S.  nanuluB  n.  sp Pacific. 

65.  S.  atomarlua  n.  sp ......Atlantic,  Lakes. 


it 


'■''     !: 


COLEOPTERA. 


201 


66.  S.  virginisB  n.  sp \tlantiu. 

67.  S.  texanus  n.  sp Gulf. 

68.  S.  venuBtUB  n.  sp Lakes? 

6£>.  S.  occidentalla  n.  sp. — (Crotch  i.  litt.) Pacific. 

70.  S.  pacificuB  n.  sp.— (Crotcli  i.  litt.) Pacific. 

71.  S.  obstruBUB  n.  sp Atlantic. 

72.  S.  arizonae  n.  sp. — (Crotcli  i.  litt.) Gulf,  Arizona. 

73.  S.  Integer  n.  sp Atlantic. 

74.  S.  floridanuB  n.  sp Gulf. 

75.  S.  colonus  Krichs. — Gen.  p.  699. ..Atlantic.  Gulf,  Laki^s,  Arizona,  Pacitic. 

76.  S.  mammopB  n.  sp Atlantic,  Lakes,  Rocky  Mts.,  Pacific. 

77.  S.  graviduB  n.  sp Atlantic. 

78.  S.  animatUB  n.  sj) Lakes. 

79.  S.  tumicollis  n.  sp Lakes. 

80.  3.  carinicoUis  n.  sp Lakes. 

81.  S.  insignia  u.  sp Pacific. 

* 

82.  S.  stygicus  Say— Trans.  Am,  Phil.  Soc.  IV.  p.  458 Atlantic,  Gulf, 

Lakes. 

83.  S.  egenuB  Erichs. — Gen.  p.  698 Atlantic,  Lakes. 

84.  S.  doloBUB  n.  sp Rocky  Mts. 

85.  S.  villOBUS  n.  sp Pacific. 

86.  S.  Bectilifer  n.  sp Atlantic. 

87.  S.  milleporuB  n.  sp. — (Fauvel  i.  litt.) Atlantic,  Gulf. 

88.  S.  jejunus  n.  sp Pacific. 

89.  S.  vinnulua  u.  sp Atlantic,  Lakes. 

90.  S.  congener  Miikl.— Bull.  Mosc.  1853,  III.  p.  192 Pacific. 

91.  S.  canaliculatuB  Gyll. — Ins.  Huec.  IV.  p.  501 Atlantic,  Lakes. 

92.  S.  caroUnae  u.  sp Atlantic,  Gulf. 

93.  S.  ageus  n.  sp *. Atlantic. 

94.  S.  pudicuB  n.  sp Lakes. 

9.'').  S.  minor  n.  sp Lakes. 

96.  S.  rigidus  n.  sp Atlantic- 

97.  S.  incertUB  n.  sp Lakes,  Rocky  Mts. 

98.  S.  parallelus  n.  sp. — (Schwarz  i.  litt.) Atlantic. 

99.  S.  noctivagua  u.  sp Atlantic. 

100.  S.  luculentua  n.  sp Pacific. 

101.  S.  juvencUB  n.  sp Lakes. 

102.  S.  pauperculua  n.  sp Lakes? 

103.  S.  hapluB  n.  sp Lakes. 

104.  S.  enodia  n.  sp Rooky  Mts. 


202 


NORTH    AMERICAN 


105.  S.  dives  n.  sp Pacific. 

10(5.  S.  Bubgriseua  n.  sp. — (Scliwarz  i.  litt.) Pacific. 

107.  S.  terricola  n.  sp Pacific. 

108.  S.  mundulUB  n.  sp Pacific. 

10!1.  S.  tuberculatus  n.  sp Oiilf. 

110.  S.  indistinctus  n.  sp. — (Bcliwaiz  i.  litt.) Lakes. 

111.  S.  brumalis  n.  sp Lakes. 

C. 

112.  S.  gratioBUB  n.  sp Lakes. 

113.  S.  monticola  ii.  sp Atlantic. 

114.  S.  curtus  n.  sp Lakes. 

115.  S.  alacer  n.  sp Lakes,  Gulf,  Arizona,  Rocky  Mts. 

116.  S.  hirsutUB  n.  sp Lakes. 

117.  S.  vestaliB  n.  sp Pacific. 

118.  S.  tahoensia  n.  sp Pacific. 

119.  S.  nimboBUB  n.  sp. — (Fauvel  i.  litt.) Rocky  Mts. 

120.  S.  pugetenais  n.  sp Pacific. 

121.  S.  vacuuB  a.  sp Pacific. 

122.  S.  amicus  n.  sp Rocky  Mts. 

123.  S.  exilia  n.  sp Pacific. 

124.  S.  califomious  u.  sp Pacific. 


Subgen.  MutinuB. 

125.  S.  (M.)  gilae  n.  sp Arizona. 

12(3.  S.  (,M.)  dispar  n.  sp Atlantic,  Uulf,  Rocky  Mts. 

chalceus  FvL  i.  litt. 


Unrecognized  Species. 

127.  S.  adspector  Makl.— Bull.  Mosc.1852,  IL  p.  316 Sitklia. 

128.  S.  parallelopipedus  Mots. — 1.  c.  p.  317 Sitklia. 

129.  S,  cariniceps  Milkl.— 1.  c.  p.  317 Sitklia. 

130.  S.  immarginatua  Miikl.— Bull.  Mosu.  1853,  IIL  p.  192 Alaska. 


AREUS. 

1.  A.  retruaus  n.  sp Pacific. 

2.  A.  fraternuB  n.  sp Lakes,  Rocky  Mts. 

3.  A.  umbratiliB  n.  sp Pacific. 

4.  A.  croceatus  n.  sp. — (Fauvel  i.  litt.) Atlantic,  Lakes. 

5.  A.  advena  n.  sp ; Lakes. 

6.  A.  europs  n.  sp Atlantic. 


COLEOPTERA. 


203 


7.  A.  megalops  n.  sp Gulf. 

8.  A.  lugena  n.  sp Atliintie. 

9.  A.  plicipennlB  n.  sp. — (Schwarz  i.  litt.) Pacific. 

10.  A.  agnatUB  n.  sp Pacific. 

11.  A.  Sayl  u.  sp Pacific. 

12.  A.  amabilis  ii.  sp Atlantic. 

13.  A.  flavicornls  (Krichs.) — (leii.  p.  7'?.? Atlantic,  Lake:.. 

i/fiiinil(iliis  Say — Trans.  Am.  Phil.  Soc.  IV.  p.  458. 

14.  A.  annularis  (Kiichs.) — (len.  p.  73,') Atlantic,  Lakos. 

15.  A.  perforatuB  n.  sp Arizona. 

IG.  A.  nitescenB  n.  sp CmU. 

17.  A.  pollenB  n.  sp Pacific. 

18.  A.  patens  n.  sp Hocky  Mts. 

19.  A.  reconditus  n.  sp Atlantic,  Lakes. 

20.  A.  propinquus  n.  sp Atlantic. 

21.  A.  canadensis  n.  sp Lakes. 

22.  A.  pinguis  n.  sp Pacific. 

23.  A.  utenis  n.  sp Kocky  Mts. 

24.  A.  trajectus  n.  sp Ivocky  Mts. 

25.  A.  papagonis  n.  sp Arizona. 

26.  A.  obsoletus  n.  sp Lakes. 

27.  A.  artus  n.  sj) Atlantic. 

28.  A.  dilutUB  n.  sp Gulf. 

29.  A.  meridionalis  n.  sp. — (Scliwarz  i.  litt.) Gulf. 

30.  A.  callosus  (Krichs.) — Gen.  p.  737 Atlantic,  Gulf. 

31.  A.  varipes  n.  sp Lakes. 

32.  A.  arculus  (Kriclis.) — (iren.  p.  744 Atlantic,  Jiakes. 

33.  A.  punctatUB  (Ericlis.) — Gen.  p.  744 Atlantic,  Lakes. 

34.  A.  dissentiens  n.  sp Lakes. 

35.  A.  Hubbardi  n.  sp Lakes. 

36.  A.  laetulus  n.  sp Pacific. 

37.  A,  leviceps  n.  sp Pacific. 

38.  A.  politulus  n.  sp Pacific. 

39.  A.  simiclus  u.  sp Lakes. 

40.  A.  pertinaz  n.  sp Rocky  Mts. 

41.  A.  lucidus  n.  sp Pacific. 

Unrecognized  Species, 
?  A.  chalybeus  Boh. — Res.  Eugen.  1858,  p.  33 California. 


In  considering  geographical  distribution  in  the  following  table  the 
only  regions  taken  into  account  are  those  of  the  Lakes,  the  Atlantic, 
and  the  Pacific,  not  only  because  they  are  the  only  ones  which  are  at 
all  thoroughly  explored,  but  on  account  of  their  continuity  along  the 


!     :!; 


204  NORTH    AMERICAN    > 

same  latitude  thoy  are  likely  to  give  the  most  \iseful  result.    We  have, 
tlieret'ore,  not  counting  tlie  unrecognized  species: — 

Peculiar  to  tlie  Atlantic  Kegion 82 

Peculiar  to  the  Lake  Region 33 

Peculiar  to  the  P.icilic  Kegion .">0 

Common  to  the  Atlantic  and  Luke  Regions  only 24 

Common  to  the  Lake  and   Pacilic   Hegions  only 0 

Common  to  the  Atlantic,  Lake,  and  Pacific  Regions.  .  .  5 

A  few  species  peculiar  to  the  Gulf,  Rocky  Mts.,  or  Arizona  faunas 
are  omitted,  and  if  included  would  not  tend  to  render  the  table  more 
significant.  It  should  be  mentioned,  however,  that  there  are  three 
species  peculiar  to  the  Lakes  and  Rocky  Mts.  only.  It  is  also  to  be 
observed  that  the  Rocky  Mts.  constitute  an  almost  insuperable  barrier 
to  the  intercommunication  of  the  various  species,  only  five  being 
common  to  the  two  slopes. 


I" 


ERRATA. 

Page  1(5,  1st  line  after  descrii    ion,  /oc  "  Peiiinjiton"  read  "  Pennington."    ' 
"     29,  1] til  lino  from  top, /or  "several"  rem/ "sexual." 
"     47,  Ifit  line  from  top,  /;<r  "  Firsh"  read  "  Fish." 

"     38  and  p.  fi3,./or  "  coiiflisiis"  rend  "deductor,"  cod/hsus  is  pre- 
occupied (Salill).  En.  Col.  hracli.  Fenn.  1870,  p.  58). 


:it 


COLEOl'TKUA. 


205 


EXPLANATION  OF  THE  PLATE. 


Fig.  1.  Maxilla  and  maxillary  palpus  of  Stmus  Juno  (Fab.)  %  ,  takoii  near 
Canibridgi:,  MaH.sadiusett.s.  Tlio  tenniiuil  spiiio  of  tlic  tliird  palpal 
joint  is  not  represonted,  as  it  was  entirely  invisible  in  the  original. 
The  triangular  area  to  tliH  left  is  the  exposed  surface  seen  when 
in  position  to  the  left  of  the  nientuni  ;  the  inner  lobe  is  strongly 
declivoua  just  to  the  right  of  this  triangle  ui  order  to  allow  the 
lobe  to  extend  under  the  labium. 

Fig.  2.  Maxilla  and  maxillary  palpus  of  Areus  annnlnris  (Erichs.;  9-  -^t 
the  end  of  the  outer  lobe  is  to  be  seen  a  thin  prolongation,  along 
the  apex  of  which  the  setae  are  irregularly  and  arcuately  bristling. 
This  prolongation,  which  forms  the  principal  distinctive  feature 
in  the  maxilla  of  the  present  species  and  tliat  of  ^teniis  Juno,  is 
of  very  peculiar  formation,  being  an  aggregation  of  parallel  fibres 
compactly  agglutinated,  and  resembling  alnu)8t  exactly  a  piece  of 
fibrous  gypsum,  or  of  some  varieties  of  ixsbestos.  Among  other 
dill'erenceSi  may  be  noted  the  very  much  longer  setae  along  the 
outer  edge  of  the  outer  lobe  ;  they  are  also  much  less  numerous. 

Fig.  3.  Labial  palpus  of  Areus  unnularifi  J .  In  the  position  in  which  it  is 
ligured,  the  spinous  thiri'  joint  is  not  seen,  but  the  view  is  that 
which  best  enables  observation  of  the  concavity  in  the  second  joint. 

Fig.  4.  Labium  of  Stemts  Jinio  9  ,  Cambridge,  Massachusetts.  The  terminal 
portions  of  the  pariiglossae  are  whiter,  and  of  a  granular  gelatinous 
texture,  tlio  ligula  being  yellowish-testaceous  ;  the  line  of  le- 
marcation  between  these  portions  is  very  distinct.     The  narrow 

,.  medial  carina  of  the  ligula  is  to  be  noted.     The  labial  palpi  are 

attached  to  minute  tuberculations  at  the  anterior  edge  of  the  ligula. 

Fig.  5.  Right  mandible  of  Areus  annularis  9  viewed  internally.  In  this 
position  the  full  curvature  of  the  mandible  is  not  seen,  as  the 
point  of  sight  is  nearly  in  the  plane  of  the  curve. 

Fig.  6.     Mentum  of  Stenus  Juno  9  as  viewed  detached  from  the  submentum  ; 

the  narrow  transverse  area  bordering  it  posteriorly  is  testaceous  in 

,        color,  and  serves  to  form  the  joint  at  tl:e  submentum  ;  it  projects 

from  below  tho  exposed  surface.      The  narrow  carinal  ridge  is 

extremely  strong,  and  the  surface  of  the  mentum  is  most  strongly 

impressed  near  the  lateral  apical  angles.     The  carina  terminates 

■  anteriorly  in  a  minute  triangular  extension  of  tlie  anterior  margin, 

■,  J       '  which  is  very  slightly  reflexed.    The  apical  angles  project  as  very 

minute  points  in  this  species.  , 


I .  • 


206  NORTH    AMERICAN   COlEOPTEnA.  t~ 

Fig.  7.  Labrum  of  Stenus  juno  9  vii'wod  on  its  luuler  surface ;  it  is  most 
strongly  im])rt'8s<i(l  in  tlio  niiddlo  and  nt^ar  tlin  posterior  sinuosity  ; 
till)  stnuttiirc  is  cellulnr,  <'si)t'c-iall\  near  the  lateral  postiirior 
itUgU'S.  Thy  slight  bilohntion  ohsorved  in  the  anterior  edge  is 
not  to  be  seen  distinctly  wLon  viewed  in  its  natural  position. 

Fig.    8.  Antenna  of  S.  sciilptilis. 

Fig.    0.  Antenna  of  5.  (Mutiniis)  dispar. 

Fig.  ]0.  Tarsal  claw  of  ^rei(s  po//e)i». 

Fig.  11.  Tarsal  claw  of  A.  recoiiditiis. 

Fig.  12.  Tarsal  claw  of  A.  propinqmm. 

Fig.  13.  Tarsal  claw  of  A.  canadensis.  , 

Fig.  14.  Tarsal    law  of  A.  pinguis. 

Fig.  15.  Tarsal  c  'vw  of  A.  utenis. 

Fig.  iCi.  Tarsal  claw  of  A.  trajectus. 

Fig.  17.  Tarsal  claw  of  A.  papagonis. 

Fig.  18.  Tarsal  claw  of  A.  tarsalis  Ljungh,  taken  from  a  European  specimen. 


1 1  ■■' 

l!  -i 


PubliBhed,  November,  1884. 


H    k 


Philadelphia : 
Collins  Pkinting  House, 
705  JayDe  Street. 


t  19  most 
inuosity ; 
posterior 
■  t!<lge  is 
'iou. 


cimen. 


NnRTH  Amemican  Stenini. 


n^ 


(E 


